PyInstaller and OpenEXR - exe crashes

Question

I am using PyInstaller 3.3.1 and OpenEXR 1.3.0 in my project.

I create single file executable with --onefile option.

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This works as intended:

import sys
if getattr(sys, 'frozen', False):
    print("hello world")

"hello world" is simply output into console and program closes.

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This on the other hand makes exe crash (no errors are displayed):

import sys
import OpenEXR

if getattr(sys, 'frozen', False):
    print("hello world")

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I tried debugging the program, to see if OpenEXR module is being properly included in exe. It is.

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1. What can be the other reason of the crash?
2. Is there any way to make the exe tell me why it crashes?

Answer 1

I found the workaround to the problem. Instead of working with OpenEXR directly, I used pyexr - the wrapper library over OpenEXR. Exe doesn't crash anymore.