Installed Xamarin.GooglePlayServices.Base and Xamarin.Firebase.Messaging and am now getting this error when building the solution. Heap size is 1GB, and from googling everywhere I understand it must be some kind of dependency issue among the nuget packages, however I have no idea how to fix this. Below is a list of my android packages, any more info will be provided if needed, I simply don't know what else you might need, I'm rather new at this.
Found a solution on github (thanks to Lucas Zhang for the link).
1: Open the .csproj project file for the Xamarin.Android app project in Visual Studio or another text editor.
2: Find the tag that contains the elements for the project, and add the following additional element to that list:
<PackageReference Include="Xamarin.Google.Guava" ExcludeAssets="all">
<Version>27.1.0</Version>
</PackageReference>
3: Delete the obj\project.assets.json file and close and reopen the solution to force the NuGet packages to re-restore.
Try Cleaning and Building the Solution, it worked for me.
On Menubar click Build -> Clean solution.
After cleaning the solution is completed, run the Project.
Related
After updating the packages "Xamarin.Forms" and "Xamarin.Forms.Maps" to latest version i.e "3.0.0.446417", the project will no longer build and I get this error:
C:\Users\[MyUser]\.nuget\packages\xamarin.forms\3.0.0.446417\build\netstandard2.0\Xamarin.Forms.targets(35,3):
error MSB4062: The "Xamarin.Forms.Build.Tasks.GetTasksAbi" task could not be loaded from the assembly
C:\Users\[MyUser]\.nuget\packages\xamarin.forms\3.0.0.446417\build\netstandard2.0\Xamarin.Forms.Build.Tasks.dll.
Could not load file or assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies.
The system cannot find the file specified. Confirm that the <UsingTask> declaration is correct, that the assembly and all its dependencies are available, and that the task contains a public class that implements Microsoft.Build.Framework.ITask.
The error refers to this place of the file Xamarin.Forms.Targets:
<XamlGTask
XamlFiles="#(EmbeddedResource)" Condition="'%(Extension)' == '.xaml' AND '$(DefaultLanguageSourceExtension)' == '.cs'"
Language = "$(Language)"
AssemblyName = "$(AssemblyName)"
OutputPath = "$(IntermediateOutputPath)">
<Output ItemName="FilesWrite" TaskParameter="GeneratedCodeFiles" />
<Output ItemName="Compile" TaskParameter="GeneratedCodeFiles" />
</XamlGTask>
And the XamlGTask is underlined with a warning which says:
Task 'XamlGTask' is not defined
What I've done so far is cleaning the whole solution, deleting the obj/bin folders and also clearing All Nuget Caches from Package Manager Settings but none of them helped.
error MSB4062: The “Xamarin.Forms.Build.Tasks.GetTasksAbi” task could not be loaded from the assembly
To resolve this issue, you should definitely make sure all projects reference the same version of the package Xamarin.Forms.
In your Solution Explorer right click on your solution node and select Manage NuGet Packages for solution.... Select the Consolidate tab and click on the Xamarin.Forms NuGet package, confirm all projects used the same version. If not, update all to the same version.
Besides, some one said that install .NET Framework 4.7.1 would help solve this issue, you can check if it helps.
Certified: https://forums.xamarin.com/discussion/comment/324869#Comment_324869
Note: If you could not install the .net framework 4.7.1 successfully, please try to update your Windows 10 to latest release. Thanks #Vahid.
Hope this helps.
Solution 1:
Sometimes it helps to kill MsBuild process with taskmanager. (Press ctrl+shift+Esc)
Solution 2:
Clean Solution
Close Visual Studio
Delete all obj/bin folders
(Sometimes a delete of packages folder is required)
Restart visual studio and rebuild
Tried all the above and failed. I mention that I use VS2017 v15.7.5.
If nothing works try this:
Close VS - all instances
Reopen VS without loading your solution
Go to Tools -> Options -> NuGet Package Manager -> Package Manager Settings -> NuGet Package Manager -> General -> Clear All NuGet Cache(s)
Load you solution and Build.
It worked for me!
I'm using VS 2017 with Xamarin Forms. These are the steps I took to resolve this error:
Make sure you're running same version of Xamarin.Forms for both Android and iOS
Close Solution
Open VS -> Tools -> Options -> Nuget Package Manager -> Clear NuGet Caches
Open Solution in Windows Explorer
Shift Delete vs folder
Shift Delete bin & obj folders in Android and iOS
Restart Computer
Once restarted, open VS and let it restore NuGet packages automatically (this may take time)
Clean solution
Rebuild solution
I had this issue and the solution was a pending restart for the windows update that had to be performed. very annoying.
I have faced the same issue recently, the simplest solution is to install .net framework 4.7.1, that's it. It's because 4.7.1 is required for netstandard2!
Reference: https://github.com/xamarin/Xamarin.Forms/issues/2667
Here is what worked for me:
Step 1: Close Visual Studio with the solution you are working on.
Step 2: Delete the .vs folder in your solution folder (The .vs folder is generally hidden)
Step 3: Re-open your solution with visual studio
Thats it.
This morning I upgraded to VS 2017 15.3 and now am getting yellow triangles for most of my references. The project runs fine (build is good in CLI and VS and restore has been run multiple times) that I can tell (and even better on dotnetcore 2.0 actually) but these remain. Has anyone else had this happen or have a suggestion? Thanks.
Link to project.assets.json file --> https://www.dropbox.com/s/c85yuyjiu4pnget/project.assets?dl=0
Also issue of greyed out usings and red references although everything builds and runs fine.
Update: VisualStudio twitter account responded to me to note that this is a bug and they are working on a fix for the future on this....
I have two responses to my post:
1) The using issue noted with things greyed out was actually a ReSharper issue. If you upgrade to VS 2017 15.3 and use R# make sure you update it as well to 2017.2.
2) The Yellow triangles issue is being looked at by the Visual Studio team but honestly I believe it to be linked to warnings in the build that those references are being coerced to either lower dependencies (ie Newtonsoft at different levels) or previews. The quickly evolving .NET 2.0 world may have exacerbated this issue. Yellow triangles have traditionally meant missing but check your warnings to see if that is related and then review the dependency chain. I will update this answer once I hear back from VS team (shout out to them and Damian Edwards + Scott Hanselman for helping me with this on Twitter).
I was experiencing the yellow triangle on references issue after updating the projects in my (.NET 4.6.1) solution to the new .NET Standard .csproj format that comes with VS2017. The references I was getting warnings for were ProjectReference type (although it seemed to spill over into PackageReference for common packages in the projects in question).
I did not have any build warnings and there was nothing in the verbose build output to indicate what the cause could be.
I could follow all warnings back to a single project in my solution. I was able to solve by removing that project from my solution and then adding it back and re-adding only the necessary project references.
It seems the issue was related to unnecessary project references (or possibly circular) caused by the new transitive dependencies support. After removing the project and adding it back with only the minimum ProjectReferences and relying on transitive dependencies support to propagate the dependency, the warnings all disappeared.
This also solved an issue where the project in question was failing compilation during a command line msbuild initiated build on my CI server which only has VS2017 build tools installed (not the full IDE).
I had the same issue, some of the references were marked with the yellow triangle. However, I was able to build and run my project.
I managed to remove these warning by following steps from this answer:
.Net 2015 References with yellow triangle for Nuget packages on portable libraries
I turned on tracing for Visual Studio, I had next warnings in log files for all uncorrectly loaded references:
Encountered conflict between 'Reference:Microsoft.Win32.Primitives, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL' and 'Reference:C:\Program Files (x86)\Visual Studio\MSBuild\Microsoft\Microsoft.NET.Build.Extensions\net461\ref\Microsoft.Win32.Primitives.dll'. Choosing 'Reference:C:\Program Files (x86)\Visual Studio\MSBuild\Microsoft\Microsoft.NET.Build.Extensions\net461\ref\Microsoft.Win32.Primitives.dll' because AssemblyVersion '4.0.3.0' is greater than '4.0.2.0'.
To be precise, I did next steps:
Removed error condition from my .csproj file
Removed <Private>true</Private> parameter for not-loaded references in .csproj file
Deleted not-loaded packages from \lib and \ref folders in corresponding MSBuild folder.
Deleted packages from \packages folder in solution.
Restored nuget packages.
I'm not sure all these steps are necessary, but it worked for me.
You could check my answer on relative topic here: https://stackoverflow.com/a/59704420/7969733
Just for documentation purpose for new person with this issue try
this and you will rememberme :D
If you go to: Tools > NuGet Administrator > Configurations. and you
have "Allow nuget...." and "automatically check...." cheked.
The only thing than you have to do is click con the button "Clear
All NuGet Cache(s)"
That's it, you don't have to edit manual thinks than can be dangerous,
believe me, I use to need to done some of the steps than describe here
a lot of time, and try more than 5 steps of the official Microsoft
documentation for that issue you could check it here:
https://learn.microsoft.com/nuget/consume-packages/package-restore#restore-packages-automatically-using-visual-studio
But just cleaning the cache solve all the problems
To "Clear All NuGet Cache(s)" in Visual Studio 2019
Tools->NuGet Package Manager->Package Manager Setting
Mismatched Windows SDK Version between the referencing project and the references will cause it. In the vcxproj file it is "<WindowsTargetPlatformVersion>SDK Version</WindowsTargetPlatformVersion>"
I was upgrading from VS2012 to VS2017. Everything was good, then I upgraded to a new version of libtomcrypt and libtommath. Rather than tweak my existing projects, I up-converted the projects from the distributions from VS2008 -> VS2012 -> VS2017. In the process, I picked up Windows SDK Version 10.0.17763.0 in both the new projects. However, all of the projects that referenced those were 8.1, and thus the warning.
I know that this was ready to solve it, and one of my answers was ready to say something about that, but, maybe some of you present the same error and none of this solution listed here solves the problem... I don't know why this problem comes with the global installation of .net 6, but, if you present this issue again, you need to go to
C:\Users\YourUsername.nuget
And delete all the content, don't be afraid, that's a cache generator than will be created again if is need it.
I had a similar issue with visual studio 2017. And discovered that, if when I changed the dependency settings of the package I wanted to install (from lowest dependency to highest) everything worked fine.
Today faced the same issue with an imported project.
FAILED ATTEMPTS: Tried updating nougat packages, checking improper imports and everything imaginable. No help.
SOLUTION: At last just tried building the solution and it worked!
PS: Try building the project first. If it does not work then go for solution hunting.
I have an ASP.NET MVC 4 app developed in VS 2012. The app consists of a main project (MyProject), a unit-test project (MyProject.Tests), an Azure deployment project (MyProject.Azure), and a couple of general-purpose library projects.
When I right-click on either the solution or the main project and select Manage NuGet Packages, I see a bunch of Microsoft updates that have apparently become available in the last month or so. If I click on the Update All button then the updates are apparently installed without any obvious problems, but when I build the solution I get this error message TWICE:
warning : All projects referencing MyProject.csproj must install nuget package Microsoft.Bcl.Build
Ok, so I have two projects that reference MyProject: MyProject.Tests and MyProject.Azure. I can right-click MyProject.Tests, select ManageNuGet Packages, and add Microsoft.Bcl.Build. That gets rid of one of the two warnings. But VS does not give me an option to manage NuGet packages for the MyProject.Azure project.
How do I add the Microsoft.Bcl.Build package to the Azure deployment project?
EDIT:
Thanks to user swell, I now know that a Microsoft Connect issue for this problem has been opened here.
The answer provided by TheESJ is correct, however the wording wasn't clear to me. Since I cannot comment on the answer, I will provide more details here. Specifically, I was having this problem with an Azure project and the following workaround was required to make the warning go away:
When you double-click the warning in VisualStudio, you will be taken to the BclBuildValidateNugetPackageReferences target in the Microsoft.BclBuild.targets file. Above the actual target element, you should find a large comment block that talks about disabling the project reference checks. Since Azure projects cannot have any library references, it is impossible for those Azure projects to fulfill the requirements of this particular build target.
The solution? Disable reference checking from the Azure project since it is impossible to actually add a nuget package reference.
EXAMPLE
So, assume we have two projects: MyAzureProject.ccproj which references MyProject.csproj. Follow these steps:
Right-click on "MyAzureProject" in the Solution Explorer and select "Edit Project File."
Find the project reference to "MyProject." It should look something like:
<ProjectReference Include="..\MyProject\MyProject.csproj">
<Name>MyProject</Name>
<Project>{1d99490e-d140-4897-9890-238e673a5864}</Project>
...
</ProjectReference>
Add the following element inside of the ProjectReference element:
<Properties>SkipValidatePackageReferences=true</Properties>
Your project reference should now look like this:
<ProjectReference Include="..\MyProject\MyProject.csproj">
<Name>MyProject</Name>
<Project>{1d99490e-d140-4897-9890-238e673a5864}</Project>
...
<Properties>SkipValidatePackageReferences=true</Properties>
</ProjectReference>
Right-click on "MyAzureProject" in Solution Explorer and choose "Reload Project."
You should now be able to rebuild and the error should be gone.
If you double click the warning it gives you instructions for disabling the warning.
It is safe to disable for projectreferences from projects that don't yet support Nuget.
See below portion in bold copied from Microsoft.Bcl.Build.targets.
BclBuildValidateNugetPackageReferences
This target can be disabled for a project reference by setting SkipValidatePackageReferences=true for the reference:
<ProjectReference Include="..\pcl\pcl.csproj">
<Project>{664a9e98-fac7-4567-a046-0dde95fddb48}</Project>
<Name>pcl</Name>
<Properties>SkipValidatePackageReferences=true</Properties>
</ProjectReference>
I faced the same issue and was trying to update Microsoft.Bcl.Build.targets; which did not help.
After some investigation found that .csproj file of the Azure Service project must be modified to include <Properties>SkipValidatePackageReferences=true</Properties>.
This was not apparent from the answer of #TheESJ and so decided to post separate answer. Thanks to #TheESJ.
I encountered this issue a number of times, and the Properties method does indeed work, but when dealing with a Wix project, I had to do the following instead:
<AdditionalProperties>SkipValidatePackageReferences=true</AdditionalProperties>
When I used the Properties Xml node, I got a new error:
The OutputPath property is not set for project
'MyInstallerProject.csproj'. Please check to make sure that you
have specified a valid combination of Configuration and Platform for
this project. Configuration='Debug' Platform='x86'. This error may
also appear if some other project is trying to follow a
project-to-project reference to this project, this project has been
unloaded or is not included in the solution, and the referencing
project does not build using the same or an equivalent Configuration
or Platform.
After failing to resolve the issues with any of the above answers, I simply followed the instructions contained within the Microsoft.Bcl.Build.targets file (displayed after double clicking on the error in the build output window).
I unloaded my project (referencing Azure packages), encountering the error. Edited the project file and inserted the following...
<PropertyGroup>
<SkipValidatePackageReferences>true</SkipValidatePackageReferences>
</PropertyGroup>
...at the top of the project file before the first PropertyGroup.
First off, let me start by saying that Nuget is awesome. I love it. That being said, there is one thing about it that I have just discovered which is really getting very annoying.
We have an in-house framework which we use for almost all of our projects. So, I recently created a Visual Studio project template for it, along with the VSIX.. had a few problems along the way due to Nuget.. it wouldn't create the new project from a template when the template was referencing the framework.. because the framework was using Nuget and it couldn't find the nuget folders in the new project created from the template. So, solution was to remove nuget from the framework project and only use Nuget for the other projects (anything but the framework). Okay, great.. that solves the problem!
However, now with every Nuget managed project that I open, it automatically adds these 2 lines back into the .csproj of the framework:
<RestorePackages>true</RestorePackages>
and
<Import Project="$(SolutionDir)\.nuget\nuget.targets" />
This is frustrating because we now need to either stop using Nuget altogether OR to keep removing these lines from our framework's .csproj file every time we want to rebuild the template.
Is there any way I can tell Nuget to ignore one project in the solution? In my case, to ignore the framework project...
With a suggestion from Nailuj and also from what I found here: http://samritchie.net/2012/09/17/nuget-packages-in-vs2012-templates/, I tried something that I thought would work, but it didn't serve my needs; that method is just for including the packages in with the new project, which for me is not helpful and doesn't solve the problem (error about missing .nuget targets folders). So, I played with it a bit and came up with something that is not ideal, but is acceptable:
Remove anything and everything to do with Nuget from the project which is to serve as a template. This then causes a problem with the referenced framework, because the framework project is expecting to be managed by Nuget and from this solution it's not, so error occurs... so:
Remove the framework project from the solution and only reference the DLL so it will build, but not complain about missing nuget folders
Rebuild
Export to template
Build VSIX using exported template
Install template
Create a new project from the newly installed template
Enable Nuget package restore on solution of new project
Open Package Manager Console
Notice message about missing packages and agree to download and install them (about 1 minute)
Remove framework DLL reference and replace with actual project (Right-click, Add Existing Project)
Rebuild and run
Celebrate!
I hope this helps anyone else who may find themselves in this predicament. If anyone has a better idea, please let me know. The bounty is still open for another 6 days, so I won't mark this as answer yet.
Issue: Just started today, all references to any assembly outside of the solution fail to resolve, with The referenced component 'SomeComponent' could not be found. when trying to build. This happens for both 3rd party components (all 15 or so of them) as well as all .NET Framework assemblies - basically anything that isn't another project in the same solution.
Trying to load some other solutions produced the same issue. Creating a new WinForms project worked without a problem, however. (Scratch that, it worked before reinstalling VS, now that doesn't work either. I created a new WinForms app as well as a WPF app, and the designer can't load the assemblies either. I tried targetting 3.5 and 2.0 and no luck.)
Things I've tried:
Repair Visual Studio installation
Rebooting computer
Started VS with /resetsettings flag
System Restore to 2 days ago when it was known to be working
Uninstalling VS and reinstalling
Fresh checkout from SVN
Does anyone have any experience with this and know of a way to get this working again? My strongest Google-fu has failed me, so I'm asking here. Can mark community wiki if requested.
Update:
I tried "upgrading" Windows (to the same version) since I didn't see a repair option for Vista and it's still a no-go. I reinstalled everything that seemed relevant. So far, it's looking like I'm just gonna have to back up and reformat I guess unless a solution comes up sometime before tomorrow.
Update2:
I just backed up data and reformatted, so I'm no longer able to verify any ideas that I haven't tried yet, so I'll just leave the bounty to expire on its own to the top voted answer and as a reference to anyone else who may have this problem later.
I had the same problem. It turns out that something was wrong with NuGet. I removed the following part of the *.csproj-File (opened in a text editor). This has solved the issue for me:
<Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
<PropertyGroup>
<ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them. For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
</PropertyGroup>
<Error Condition="!Exists('$(SolutionDir)\.nuget\NuGet.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\.nuget\NuGet.targets'))" />
</Target>
In my case, the solution was completely different. It looked like it was an issue with NuGet paths (caused by my moving the project to a different solution and then back again.
I edited the .csproj and removed all references to NuGet and associated packages. I also removed the packages folder from the solution folder.
The system components then magically reappeared.
Suggested next debug step: review Project Designer: References -> Reference Paths to verify that the paths to your system and third-party components appear correctly. (Watch out for things that can slip past the old Mark I Eyeball like drive letters.)
Try running VS after turing on Assembly load logging with fuslogvw. You'll be able to see additional errors captured by the runtime when it tries to locate and load the assemblies.
In Vista, you'll have to run fuslogvw as an administrator and somtimes specify an explicit path to save the logs.
You can also try debugging Visual Studio by attaching to it from another instance, or with the basic debugger included with the .NET SDK.
I had this similar issue not too long ago.
I found that the issue was caused by git not properly creating .exe's when jumping from branch to branch(we have nuget.exe in a path and it was getting deleted/added when jumping branches). When you would try to run nuget, windows would throw a fit over the exe.
After reseting the branch many times, I finaly got the exe to run properly. Then I noticed that the security on all the directories in the repo had been reset, so I had to deal with that.
After all of that, visual studio then started to play nice.
Hoped this helps someone!
It may also be a problem with references of other projects in the same solution. I only wanted to build one project, but got this message about references in another project. Although the problem in the other project was correct, I think the message was not correct:
I did not expect the message about another project (the other project was no dependency, so it did not 'need' to be built)
I could not 'interpret' it, because it did not mention the project it was about).
Well, if you click on the error, in VS 2012 RC, and then debug it, the error is gone...
I know that this is an old question but it is still happening in the latest version of Visual Studio (2015). I fixed it in a different way that might not have been available back when the question was asked. Basically, it is related to the fact that VS can't find the .Net Library package. To fix in the latest version of Visual Studio (2015):
Right Click on your solution in the Solution Manager. Choose "Manage NuGet Packages for Solution..."
in the NuGet Window, go to "Installed".
If you have something related to Microsoft.Net such as "Microsoft.NetCore.UniversalWindowsPlatform", remember the name and uninstall the package.
Now go to the browse tab and find the package and install it again. Don't forget to select the correct needed project.
Everything should be ok now.
I hope this helps somebody!
I hate to say it, but it sounds like the system is pretty borked. There has to be a point when it is quicker to reinstall the OS than it is to continue trying to fix the current install.
I just hope you take this in the right spirit... sorry.
Shot in the dark here, but I've run into the same (similar) problem. The issue I ran into was related to having a 64bit machine and running a project that had a mixture of 64bit and 32bit 3rd party dll's. The solution was to ensure I had the correct bits (32v64) and then to have the project build in 32 bit mode: project properties > build > platform target: x86.
Another time this occurred I had to remove all the 64bit dll's and reinstall with the 32bit dll's
HTH's
.nuget folder was missing. add the .nuget folder with nuget files (usually 3 files). open the solution and no warnings on references. My submodule has nuget references and when I pulled the latest version, the solution needs .nuget folder in the project folder.
i.e.
project
/.nuget
/submodule
/.nuget
Visual Studio was unable to find any of my references.
What i did, and following some solutions above, was:
Right click solution entry in Solution Manager window;
In the newly opened NuGet window go to installed, select all entries and update.
The problem gets solved!
Check your output with ILDASM to make sure the references are showing up correctly -- compare them to an assembly that works, and see if anything jumps out at you.
I once encountered a problem, which is in the *.csproj file. It defines an Error node in the Target node, that if one reference/nuget-library doesn't exist, it throws the error while building. The problem is VS do not show correct status for other libraries, thus all the referenced libraries looks like non-loaded, that the local file path cannot be found in the property window.
Here is a sample.
<Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
<PropertyGroup>
<ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them. xxx.</ErrorText>
</PropertyGroup>
<Error Condition="!Exists('..\packages\...\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\...\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.props'))" />
<Error Condition="!Exists('..\packages\NOT-Exist.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\NOT-Exist.targets'))" />
</Target>
...