Pyinstaller With Pandas And Numpy, Exe Throws Error At Runtime

I am trying to make an EXE using Pyinstaller of a small test program. I made a virtual environment to make the exe size smaller as anaconda includes every library it has. ERROR at

Solution 1:

There is definitely an issue between PyInstaller 3.4 and numpy 1.16 leading to the error you see. Until the issue is resolved, reverting numpy to 1.15.4 should work for you:

pip install numpy==1.15.4

Then rebuild your .exe with PyInstaller and try again.