multiprocessing - cx_Freeze: Python error in main script - what means this error message? -

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I have a GUI (main thread) with some subthreads and a process in my program. In the main script, Use: 

  multiprocessing.freeze_support () multiprocessing.set_start_method ('spawn')

Process P has begun via suburban ST and queue Communication with this subtracted ST from: 

  queue = multiprocessing.Queue () ... process = multiprocessing. Process (target = complex fix, come Credits = Processes) process.start () ...

The sub-reported ST message sends messages to the main GUI thread from X: 

  PySide.QtCore. Signal () ...

The message text in the main GUI thread is output in the edit field.

I make my script executable with cx_freeze: 

  setx_freeze import setup from cx_Freeze importable cx_Freeze ...  < / Pre> 
 If I start my programm.py file, but in a moment I have a short delay. / P> 
 If I start my programm.exe file then it works, but I have a delay in a few moments and then I get the following error: Sage After the following error message, the remaining messages are output. 
 
 Enter image details here 
 
 statement to me in line 58 
 
  multiprocessing.freeze_support ()  
 
 I do not understand this error message. Can you help me 
 
 Python 3.4.2, cx_Freeze 4.3.4


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