Using an environment variable set to a path value: the system cannot find the path specified for %OPENCV_DIR%
Next time just try to close and reopen the process (hehe what a cliche...)
The reason is that once a process is launched, all the variables are being written to its own address space.
If you are changing the User \ System variables - the open cmd.exe (for example) won't get the new values, but a new cmd.exe process will...
gl,
Refael
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dumbledad
Updated on September 18, 2022Comments
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dumbledad over 1 year
I'm trying to set an environment variable to point to the directory into which I have extracted the latest version of OpenCV, following the instructions in OpenCV's Installation in Windows tutorial.
Here's my elevated command line listing.
C:\>cd C:\OpenCV2.4.6\build\x64\vc11 C:\OpenCV2.4.6\build\x64\vc11>cd ../../../.. C:\>setx -m OPENCV_DIR C:\OpenCV2.4.6\build\x64\vc11 SUCCESS: Specified value was saved. C:\>cd %OPENCV_DIR% The system cannot find the path specified. C:\>echo %OPENCV_DIR% %OPENCV_DIR%
- Firstly I change directory to
C:\OpenCV2.4.6\build\x64\vc11
to ensure that it exists. - After that is successful I change directory back to the root of the C drive.
- Then I use
setx
to makeOPENCV_DIR
a system wide environment variable with value theC:\OpenCV2.4.6\build\x64\vc11
path I verified in step 1. - Noting the success of
setx
in the previous step I now change directory using the new environment variable. But it fails with the messageThe system cannot find the path specified.
- If I try to
echo
the value of theOPENCV_DIR
environment variable it appears not to be set.
Looking in the control panel the OPENCV_DIR environment variable looks correctly set:
What's wrong? Why is the variable not working? Am I evoking it incorrectly when I use it to change directory or echo its value?
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dumbledad over 10 years<clutchingatstraws>I'm going to try restarting the PC - I haven't tried that.</clutchingatstraws>
- Firstly I change directory to
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bot1131357 almost 7 yearsWorks every time!