Sometimes when I change my environment variables in Windows, and then use software the depends on those variables, they are not properly updated.
And good example is to change a variable, then open up Windows Command Line and echo the variable and see that it hasn't been changed, even though you properly changed it in the Environment Variables window.
Another example I'm dealing with right now:
I've been using Python 2.4.x for a while for a project, which uses the env var PYTHONPATH who's value has been:
C:\Python24;C:\Python24\lib
Today I installed Python 2.5.x for the project. I changed my PYTHONPATH to be:
C:\Python25;C:\Python25\lib
When I use Python 2.5 to run a script and do this:
import sys
print sys.path
It prints:
'C:\\PYTHON24', 'C:\\PYTHON24\\lib' (and some other Python 2.5 related default installation paths)
So clearly, the old PYTHONPATH environment variable changes aren't really sticking....
Does anyone know why this happens and how to fix it?
When you change an environment variable in the System Properties tab, the new value will propagate to the Windows Explorer, and any apps (such as cmd.exe) opened from the Windows Explorer (or the Run box, Start Menu, etc.) should see the new value.
However, if you're running a program such as an editor or python or some non-Microsoft program launcher, then change an environment variable, and then launch cmd.exe from that program (instead of Windows Explorer) you are likely to see the old value of the environment variable. The reason is that the running program ignored the notification from Windows saying that the environment has changed (not at all unusual), and since the launched process inherits the environment variables, the child process won't see the changes.
The workaround is to make sure you start your app from Windows Explorer or the Run box. Rebooting your machine will work also (if rebooting doesn't solve the problem, then something else is going on).
I'm trying to create a php documentation on my local XAMPP host (on Windows 7) with phpDocumentor.phar (v2.). It gives me (after parsing all the files) this error:
Unable to find the dot command of the GraphViz package. Is GraphViz correctly installed and present in your path?
I searched a lot, but nothing helps. What does 'path' means? If I open a command box at any location I can start the dot.exe (which gives me no output but waiting prompt). In my environment path variable the bin folders is added. GraphViz is installed correct in Program Files and runs standalone.
What could I do or check?
In order to get GraphViz running properly with a Windows based phpdoc installation, just put the GraphViz program directory (c:\some\path\graphviz\release\bin) to the Windows Path system variable.
In order to do this, follow these steps (Win7, please provide your OS version if this doesn't apply to your situation):
From the desktop, right-click My Computer and click Properties.
In the System Properties window, click on the Advanced tab.
In the Advanced section, click the Environment Variables button.
In the Environment Variables window, highlight the Path variable in the Systems Variable section and click the Edit button.
Different directories are separated with a semicolon:
C:\Program Files;C:\Winnt;C:\Winnt\System32
It will most likely look a bit different in your enviroment, so please just take this for an example. Just add the GraphViz Path at the end like this:
C:\Program Files;C:\Winnt;C:\Winnt\System32;C:\somefolder\graphviz\release\bin
I'm not too sure if you have to reboot your system after changing this value. You had to do this in the old days of Win2k, and I just don't know if this still applies to modern Windows versions. It surely doesn't hurt!
After this, phpdoc should be able to find the dot command.
The steps to resolve this error are:
download Windows Packages from
https://graphviz.gitlab.io/_pages/Download/Download_windows.html
Just install it
add c:\Program Files\Graphviz*\dot.exe or c:\Program Files (x86)\Graphviz*\dot.exe to your environment variable PATH
run phpdoc
Re-start your machine & run phpdoc (if still shows the same error message)
I decided to download go last night and see what it was all about. Trouble is, I can't get the damn thing to function. I downloaded the program, created a workspace, tried using the go install command, and nothing. I have my workspace located at C:\go\src\gocode in which is my hello.go file. I tried manually setting the GOPATH variable to this location via setx GOPATH C:\go\src\gocode, but no luck. Can anyone possibly point me in the right direction?
The Go project provides two installation options for Windows users
(besides installing from source): a zip archive that requires you to
set some environment variables and an MSI installer that configures
your installation automatically.
MSI installer
Open the MSI file(https://code.google.com/p/go/wiki/Downloads?tm=2)
and follow the prompts to install the Go tools. By default, the
installer puts the Go distribution in c:\Go.
The installer should put the c:\Go\bin directory in your PATH
environment variable. You may need to restart any open command prompts
for the change to take effect.
Zip archive
Download the zip(https://code.google.com/p/go/wiki/Downloads?tm=2)
file and extract it into the directory of your choice (we suggest
c:\Go).
If you chose a directory other than c:\Go, you must set the GOROOT
environment variable to your chosen path.
Add the bin subdirectory of your Go root (for example, c:\Go\bin) to
your PATH environment variable.
Setting environment variables under Windows
Under Windows, you may set environment variables through the
"Environment Variables" button on the "Advanced" tab of the "System"
control panel. Some versions of Windows provide this control panel
through the "Advanced System Settings" option inside the "System"
control panel.
This is from : http://golang.org/doc/install
For a quick way to install golang on windows, try the MSI installer. The installer will only add the C:\Go\bin directory to your PATH, you need to setup the GOPATH manually in your environement settings.
From the golang site:
Under Windows, you may set environment variables through the "Environment Variables" button on the "Advanced" tab of the "System" control panel. Some versions of Windows provide this control panel through the "Advanced System Settings" option inside the "System" control panel.
Then just add a variable name GOPATH with the right location. You should choose a location different from GOROOT to ensure you don't mix standard package with yours.
Based on your preferences and requirements, try this:
In windows command console, try enter the following line,
including the quote marks shown, and then hit ENTER key:
setx PATH "c\go\bin;C:\go\src\gocode"
Sorry about being a newbie for this issue... But I'd really like to know the scope and when to run the SetEnv.Cmd under the Bin folder of the Windows SDK.
Since I only ran it in a command prompt, isn't the environment variable settings I did their only local to that session? Do I need to re-run it after I close that session? I tried and it seems to be that I don't need to, but... Why is this all done in a local session?
Sorry about the naive question,
Shawn
The SDK build tools require environment variables to be configured for the include path, library path, exe path, etc. Each version of the SDK has its own include files, etc. so each version requires different values for the variables. Hence the variables cannot be configured as permanent variables for the user (or system).
Instead, each SDK version provides the SetEnv.cmd batch file to configure the environment for that version of the SDK, and the variables are local to the current command-prompt.
When you install the SDK you get a shortcut created in the Start Menu that opens a command-prompt and runs SetEnv.cmd for you. For example, on my computer I have "Windows SDK 7.1 Command Prompt".
I just download Android Studio for Windows 7, the wizard went ok up to the end but now when I click on the shortcut or on the .exe to start the program nothing happens, no error, no new window, it's seems like it is doing nothing. Do you have any suggestion?
It's a bug of Android Studio 0.1v
You should add JAVA_HOME to the system environment variables.
http://tools.android.com/knownissues#as0.1
Open Start menu > computer > System Properties > Advanced System
Properties
In the Advanced tab > Environment Variables, add new system
variable JAVA_HOME that points to your JDK folder, for example C:\Program Files\Java\jdk1.7.0_21
Install latest Java Development Kit.
Set path in system variables for Java (ie *C:\Program Files\Java\jdk1.7.0_21\bin*)
Set JDK_HOME system variable (ie *C:\Program Files\Java\jdk1.7.0_21*)
If not working, set JAVA_HOME in system variable too (ie *C:\Program Files\Java\jdk1.7.0_21*)
If not working, check if you don't have spaces at the ends of the lines in system variables (PATH, JDK_HOME, JAVA_HOME)
You don't have to restart computer after changing system variables, just reload command prompt (if you are using it).
If it still not working, you probably have java.exe in C:/Windows/System32/. Rename it, restart command prompt and type java -version to check if you are using correct version of JDK.
I've posted tutorial how to fix Android Studio with screenshots on my blog.
I have had a similar problem with Android Studio 1.0 in windows 7 x64. When I ran studio64.exe it flashed the android studio logo and it disappeared immediately. Also I tried
studio64.exe > error.log
to figure out possible errors. JAVA_HOME=C:\Program Files\Java\jre1.8.0_25 environment variable was correctly setted.
Finally I decided to uninstall all Java versions (I had a mess of different java versions installed), both jdk and jre and reinstalled last version jdk 1.8.0_25. My problem was solved.
Regards,
Sometimes it might get stuck in memory. Open task manager, terminate android stuido. Open it up again.
If you install new the version of android studio.
It requires new jdk 1.8.
Just install the latest jdk 1.8 and android studio will work without the need to manually edit any environment variables.
You have to add a new system variable named ANDROID_STUDIO_JDK or JDK_HOME with the path to your JDK install folder, such as C:\Program Files\Java\jdk1.7.0_21\
I had the same exact problem and did try to do every thing manually nothing worked except for this command when I finished it finally launched. Open CMD with administrator if possible then put the following command:
set path="$PATH":C:\Program Files\Java\jdk1.7.0_21\bin
Then just try to launch it should work.
This is the only thing that worked for me.
Make sure you have Java 1.8 (JDK) or higher and update java_home and path to this version.
I did every tips but i checked AS requirements and updated jdk do 1.8.xx
It's possible there is a problem with your username (and name of the user folder). It shouldn't contain non-latin letters.
I had solved my problem (no response to an attempt to run Android studio) when I tried running the application as another Windows user (with name that consists of English letters only)
I got the same problem, but with no error message.
I found a studio.bat file and dig in it. There, I found some tips:
I found out thet the variable suggested in a previous post is incorrect.
ANDROID_STUDIO_JDK is no good.
STUDIO_JDK is the one.
Also, just to make the things/solution worst to corner,
I've uninstalled jre and jdk then reinstall jdk only.
The setup variables are like this:
JAVA_HOME is now pointing to C:\Program Files\Java\jdk1.8.0_172\bin
JDK_HOME is pointing to C:\Program Files\Java\jdk1.8.0_172
STUDIO_JDK is pointing to C:\Program Files\Java\jdk1.8.0_172
It's a mess but it's working...
Is it because I uninstalled/reinstalled java sdk and jre? or just the env. variables? who knows :)
Specs:
i5 with 4gig ram
win 10 32bit
In addition to following the steps pointed out by Tigris I also had to run the Android Studio with Administrative rights. Not sure why but I just made it in a few minutes ago.
Follow the steps here: http://tools.android.com/knownissues#as0.1
Run Android Studio as Admin
There is Another Issue
http://tools.android.com/knownissues
open a "cmd.exe" (command prompt), cd to the android-studio\bin folder and run "studio.bat". You will most likely see an error: for example b/55267 is about the option -XX:+UseCodeCacheFlushing not being recognized. Report the error, remove the line from the studio.exe.vmoptions or studio64.exe.vmoptions and it should now work.
There could be a process still running in the background that would need to be killed in the task manager. The name of the process is studio64.exe (at least that's the name on my machine). Could be because I am running a 64-bit OS. After killing this process, try to run Android Studio again, and it should work.
If your path and/or environment variables are not pointing to the correct JDK, things won't work properly.
A rock solid solution, especially if you must have multiple JDKs installed (e.g. Java 6/7/8) is to create a batch file to launch Android Studio.
Create a new file called studio.bat and place this somewhere outside the Android Studio installation, e.g.
c:\mydevstuff\launchers\studio.bat
(if you put the batch file anywhere in the android-studio folder, then you'll have problems when updating Android Studio).
Put the following code in the new batch file:
#echo off
REM Can make paths relative to SCRIPT_PATH if necessary
set SCRIPT_PATH=%~dp0
set ANDROID_STUDIO_JDK=<JDK Path>
set JAVA_HOME=<JDK Path>
set PATH=<JDK Path>\bin;%PATH%
cd <android-studio Install Path>\bin
start studio64.exe
Replace studio64.exe with studio.exe if you need the 32-bit version.
Replace
<JDK Path>
with the path to your JDK, e.g.
C:\Program Files\Java\jdk1.7.0_25
Replace
<android-studio Install Path>
with the path to your Android Studio installation, e.g.
C:\Program Files\Android\android-studio
Now you can just run the batch file to start Android Studio.
Additional:
If you want to pin to the Taskbar, then create a shortcut to the batch file and then change it's target to:
cmd.exe /c "<path to bat>\studio.bat"
Then pin this shortcut to the Taskbar by drag-and-drop.
You can also set it's icon from the original Android Studio studio.exe file.
I ran into this problem and these steps fixed it.
Remove ALL older JRE / JDK versions
Set values for JDK_HOME & JAVA_HOME to path of JDK install
if you use android studio version 2.3.3 you should have JDK with version 1.8 in the system environment values ,
to add it
click on Computer (in windows 7)
System properties
Advanced system settings (at the right)
Advanced (tab)
environment variables button
and edit the value of name JAVA_HOME to the file which contains jdk 1.8
if you don't have this variable make a new one