I encountered the issue as well.
I was able to reproduce the issue reliably when using pyinstaller with console option set to false (when false it won't show a console window, only your applicaton window), but when I ran the pyinstaller with console option set to true everything worked just fine. The bug seems to be related to stdout not 'existing' which causes issues in matlab side.
I was able to fix the problem with any of these:
- Redirecting stdout and stderr to StringIO stream (see example below)
- Having a console window visible
- Removing all disp functions from matlab code
Example on how to redirect stdout:
import io
import your_matlab_package
p_handle = your_matlab_package.initialize()
p_handle.your_matlab_function(..., stdout=io.StringIO(), stderr=io.StringIO())
If you want to actually show matlab disp results in python side you can of couse create a new class which inherits StringIO and override the write function where you would actually show/log the matlab output.
