An error occurred while executing the compiled file "Without a module named" scipy._lib.messagestream "after using pyinstaller

Question

I am trying to execute our https://bitbucket.org/OES_muni/massiveoes code using pyinstaller after upgrading from python 2.7 to 3.6 and moving to scipy 1.0.0 at the same time. I work on a 64 bit win7 machine. The program itself works fine, pyinstaller starts without errors, but when I try to run the exe build file, it gives me this error:

Traceback (most recent call last):   File "massiveOES\GUI.py", line 23, in <module>   File "c:\users\petr\envs\py1\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 631, in exec_module
    exec(bytecode, module.__dict__)   File "massiveOES\__init__.py", line 1, in <module>   File "c:\users\petr\envs\py1\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 631, in exec_module
    exec(bytecode, module.__dict__)   File "massiveOES\FHRSpectra.py", line 1, in <module>   File "c:\users\petr\envs\py1\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 631, in exec_module
    exec(bytecode, module.__dict__)   File "massiveOES\spectrum.py", line 3, in <module>   File "c:\users\petr\envs\py1\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 631, in exec_module
    exec(bytecode, module.__dict__)   File "site-packages\scipy\optimize\__init__.py", line 241, in <module>   File "c:\users\petr\envs\py1\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 631, in exec_module
    exec(bytecode, module.__dict__)   File "site-packages\scipy\optimize\_minimize.py", line 28, in <module>   File "c:\users\petr\envs\py1\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 631, in exec_module
    exec(bytecode, module.__dict__)   File "site-packages\scipy\optimize\_trustregion_krylov.py", line 2, in <module>   File "c:\users\petr\envs\py1\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 631, in exec_module
    exec(bytecode, module.__dict__)   File "site-packages\scipy\optimize\_trlib\__init__.py", line 1, in <module> File "c:\users\petr\envs\py1\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 714, in load_module
    module = loader.load_module(fullname)   File "messagestream.pxd", line 5, in init scipy.optimize._trlib._trlib ModuleNotFoundError: No module named 'scipy._lib.messagestream' [2128] Failed to execute script GUI

Answer 1

, : pyinstaller .spec, Scipy:

 hiddenimports=['scipy._lib.messagestream']

. .