This question already has answers here:
A project with output type of class library cannot be started directly - with a startup exe
(9 answers)
Closed 7 years ago.
If I right click on a project in Solution Explorer, and select Debug->Start New Instance, then the compiler kicks in getting everything ready to run. Good work so far.
However if during that compile I click within a source file that I happen to have open for editing, then the debugger attempts to launch the project that contains said source file! Usually this results in it complaining that it can't launch a class of type library.
If I sit and wait patiently for the compiler to complete before launching then all is well. But that's a bit annoying if I want to read some other code whilst it's compiling.
I'm working with C# and C++ in case that's important - you never know!
Update
The application that I want to launch is also selected as the startup project. But then that shouldn't actually matter if I specifically select the application to be started.
right click solution on solution explorer;
>> Common Properties
>>>> Startup Project
probably "Current selection" is selected . select other one of items
Related
I left VB6 and programming all together years ago, so pardon since I'm still dusting off what I remember.
I have an old program made for a friend in VB6 that he still runs in Windows Vista. He tried to update a label in the program and in trying to do the update, he has overwritten the project file where I used to see all forms and modules together.
Is there a way I can recover or recreate the project file as it was? All project files and modules are there, but when I open the VB6 project it shows only one form, that I can't compile or execute because it shows a "source not found"
I tried to go back to an old version of the project file with file recovery software but I couldn't find it.
Other way?
Practical steps to recover:
First and foremost: Back up what you have. Do this now.
Second, and only after the first, check (again) to see if you have a previous backup. Yes, this may seem pedantic, but, really, it's worth looking. Was that the only copy? Once you do all of this, consider creating a git repo for your code.
Third, in your empty project, simply right-click in the project explorer (Ctrl + R), and click "Add >" and then "Add Files...". Then, in the file input box, scroll down to the first file, hold down shift, and keep pressing the down arrow and all the files you want. Click "Open". Repeat if need be.
Finally, you need to re-add any dependencies. One way is simply to try to run the program with full compile (Ctrl + F5 or File | Run With Full Compile in the menus). If everything starts up, consider yourself fortunate. If not, you'll have to see each one that fails and add them back. This could be tedius, but just go through them one by one. In the Project menu, both "Components" and "References" can be gone through. Do this until the program successfully starts with full compile.
At this point, consider a making a backup. ;)
This problem is very similiar to those:
"The binary code for the script is not found" and
The binary code for the script is not found” ssis
I have an SSIS project with multiple script files. SSIS claims that one of them has no binary even though there should be. There are no code errors, and I can build it properly. I suspect it's a VS bug because this problem appears and disappears randomly. What I mean by that is that this script is working fine, I open it to see the contents, close and suddenly this error happens! So I open it like 20 times, and it (without me doing anything) repairs itself! Any ideas on how to make it work better? It seems (though I can't confirm with 100% certainty) that this problem happens when you save the SSIS script (as in use ctrl+s) instead of simply exiting from the VS.
Things that I have tried that sometimes work:
Restarting Visual studio, opening the script without doing anything, closing it
Adding a small change to the code, exiting
Removing and adding breakpoints
Going on my knees in the direction of Redmond, Washington, and chanting the names of M$ presidents while opening and closing windows in the building to the rhythm of the windows starting sound
Randomly closing and opening the project, as well as going through items in the script component menu
Things that don't seem to work: rebuilding project, cleaning project, you know the standard stuff
I've found a solution that OFTEN works. Notice the usage of often.
1) Try restarting your computer.
2) If it doesn't work go to your system temp files directory, and find the location of SSIS temp projects (you can also open the script, right click on C# project, explore in windows explorer). Delete the project. (Make copies before deleting just in case). Start Visual studio, and once again edit script, close, hope it works. DON'T SAVE THE SCRIPT PROJECT BEFORE CLOSING! JUST CLOSE!
Note that for the second step, you can also try using a cleaning tool, like CCleaner of similar.
In my case, I did some idiotic changes to main package solution config manager and tried changing the "Target SERVER Version". That wiped out all the scripts project from each packages. Then I came to know that it is auto-generation everytime we open. That means each package is storing script project within it. But now I don't know why its not generating while pressing on "Edit Script button" (really pissed!)
Thank for suggestion. In my case, I did some idiotic changes to main package solution config manager and tried changing the "Target SERVER Version". That wiped out all the scripts project from each packages. Then I came to know that it is auto-generation everytime we open. That means each package is storing script project within it. But now I don't know why its not generating while pressing on "Edit Script button" (really pissed!)
"Lucky I am" . got an fix! Each package file was internally not linked with their Script.cs. So I opened each package file in Notepad++ and found Script.cs content within. I recreated scripts.cs in each package (steps) and pasted the content from notepad++. And it worked!!!
I have run app on simulator, then stop it and then I clicked Run button one more time.
I have not modified any files in the project just rerun it. But it takes the same time for compiling Swift files even in case I already built a project (5 - 7 mins).
What can be a problem?
Hit Run button then,
Goto "Report Navigator", within left panel of Xcode,
Select current build,
After selecting, within center panel you can see files getting complied one by one and you can identify which particular file is taking long time for compiling.
Or else if you wish to know, which particular function in your code is taking long time, I will advice you to go here.
.NET 4, console application. The project is set to 'Debug' mode. The breakpoint being set is in the primary/startup project. I have right-clicked -> Clean, and right-clicked -> rebuild, both on the Solution and project levels.
Following the instructions in this SO question, I have confirmed that my "Build and Run" options are set to 'prompt' for both 'When projects are out of date' and 'when build or deployment errors occur', and I am NOT getting a prompt when I F5 to build/run.
Also, the 'save all changes' under 'before building' is also selected (plus I manually saved them myself).
I monitored the output window of the application, see this line:
'MyApplication.exe': (Managed (v4.0.30319)): Loaded 'C:\exepath' Symbols Loaded.
I restarted the VS2010 instance. I restarted all open VS2010 instances (of other projects). I've even gone through a reboot.
However, the breakpoint I am setting in the startup project is a hollow-red circle, with the notice that 'This breakpoint will not currently be hit, The source code is different from the original', and, in fact, is never hit.
So, this is really 2 questions:
1) How do I fix this problem so I can properly breakpoint
2) When I see this, does that mean my code is executing from an older build?
I've had this problem once myself but that was on a vsto addin. In that case there were left over intermediate files under the users/appdata directories that were actually loaded instead of my app.
There is this blog article that has a whole load of possible reasons for this error and then a whole bunch more in the comments from other users
This can also happen if you have a solution with multiple projects, and have the wrong project selected as your startup project in VS2010 and VS2012.
Now, obviously, I wouldn't expect debugging to work if I have the wrong startup project selected -- the debugger is attaching itself to the wrong process!
But this error message (in my case) was terribly misleading. It made me think something else was wrong. I tried a bunch of solutions in this thread (nuking various /bin and output directories) when really it was something very simple (wrong startup process).
If you are using vb, check that you are building the project for the active solution configuration (Build, Configuration Manager..., Column under Build is checked. Also check the project properties, Compile tab, Advanced Compile Options, and Generate debug info is set to Full. Sorry I can't tell you where this may be in C#.
The only other time I've seen this is when two projects in the solution are referencing the same dll but they are referencing from different sources. One from a project reference and another from a file reference for example. If the "copy local" option is true, there would be the potential of overwriting the dll with an older version of the same dll.
My solution might help people who have signed the assembly.
After lot of head scratching for the past two days, I was able to resolve the same issue by doing the following simple steps:
Go to your Visual Studio project properties.
Go to the "Signing" tab.
Uncheck "Delay sign only" option if it is checked.
Now run your project and it should work.For me it did work.
In my case was this same problem (“The breakpoint will not currently be hit. The source code is different from the original version.”) caused by fact, that I tried add breakpoint to declaration:
DateTime dt;
bool b = DateTime.TryParse(null, out dt);
(first line of code)
So I assume that message is "universal" and may have many different causes.
This can happen if your system clock was changed since the last compile. Your PDB file will be different date than the one your are trying to debug. Delete the PDB files in the project and recompile.
I experienced the problem when Project > Properties > Web did not have "Enable Edit and Continue" selected. After enabling this feature the issue was corrected.
It is important to note that under Tools > Options > Debugging > Edit and Continue "Enable Edit and Continue" was selected, but it was not enabled for this project.
Just go to Tools / Import and Export Settings
Choose reset all settings then click Next
No, just resetl settings, ovewriting my current settings then click next
Choose your current language, por example C#. then click Finish
If you have multiple solutions open, try simply closing all Visual Studio instances and restarting only the instance you need.
In my experience this has happened when two branches of nearly identical code are open in different instances.
doing a "clean solution" from VS Build Menu might help you.
I had to go over all those steps to fix the issue on my computer.
Make sure that debug = "true" on your web.config
Clean and rebuild all projects
Delete every file inside the bin folder of all projects
Close and open Visual Studio, rebuild, and run the project again.
Go to your solution folder -> obj -> Debug - > delete the .dll file and build the solution again.
Wondering if anyone has a solution to this 2010 bug. I have a project that built fine in Visual Studio 2008 that wont build in 2010 because Visual Studio is holding on to the dll after the application is run ONLY if a designer window is open. I created a really light weight project that shows this problem. If you create an application then create a lib dll. Put one form in the dll, open the form in design view and then run the application. It will run fine, then close the app, go to the code view of the form in design view, and change the code ( I just renamed a single variable) then try to recompile you get the following:
Error 1 Unable to copy file "obj\Debug\customlib.dll" to "build\debug\customlib.dll". The process cannot access the file 'build\debug\Customlib.dll' because it is being used by another process.
If you run Process Explorer and search for the dll, the only process holding the dll is devenv.exe!!!
I have done a ton of searching on this problem and have found similar issues with older versions of Dev Studio where people were able to just add a pre-step to move the locked dll to another name (.locked) and build. Well that works the first time, but the next time you run then edit you are locked out of both the current dll and the one you moved to .locked, so unless I am willing to add code to randomly generate a name for the locked dll, this wont work for me (I don't want my debug directory size to grow with files never getting deleted.)
I have only found one workaround and if you are in this same boat this is what I have to do to edit and run. I make sure EVERY design view window is closed BEFORE I ever run my project in the debugger. If you close all the open design view windows devenv.exe will not hold the dll.
Does anyone have a better solution to this problem?
I'm not sure whether this will work for you or not, but this similar question if you have this line in AssemblyInfo.cs:
[assembly: AssemblyVersion("2.0.*")]
changing it to:
[assembly: AssemblyVersion("2.0.0.0")]
will solve this isue.
The Visual Studio add-on "VSCommands" claims to have a fix for this problem. I've not tested it yet, but it also claims to have an in-IDE stackoverflow reputation tracker which intrigues me :)
Your "Close designer before debugging" workaround seems to be working for me (so far), for which I'm very grateful. It was beginning to get to the stage where am large part of my day was spent in the following workflow...
F5
loud expletive
ALT F4
WIN 3
waits impatiently...
F5
I have had the same problems for a long time and then suddenly they disappeared. I realized that the source of the problems was initializing code in the constructors of WCF services and WPF controls. After cleaning the constructors from any dependencies to other assemblies everything has been fine.
So my suggestion is: Clean your constructors.
In WPF it is possible that inserting:
if (DesignerProperties.GetIsInDesignMode(this)) return;
or similar will have the same effect.