Error opencv_world420d.dll was not found

C++
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1

The following error appears:

The code execution cannot proceed because opencv_world420d.dll was not found. Reinstalling the program may fix this problem.

I tried reinstalling the program but nothing changed.

2

you have to add the folder with the opencv binaries to the PATH environment variable, so your program can find the dll at runtime

3

Have you checked BUILD_opencv_world flag in your cmake file? Otherwise opencv_world420.dll will not be created, the build will create seperated dlls (improc., core, highgui etc.)