Microsoft Visual C++ Runtime Error in Python

Question

I have a python program that runs in a server continuously and it puts some data into MYSQL dataBase and load some. It is also using TCP/IP connection. the problem is that after about 24 hrs it gives a runtime error:

Microsoft Visual C++ Runtime Library!

Runtime Error!

Program: C:\python27\pythonw.exe

This application has requested the Runtime to terminate it in an unusual way.

And I hit OK python shell closes. And when I close all python files and check Windows Task Manager I see still there is a pythonw.exe file open there!!!

I am using IDLE to run my application.

Answer 1

In my former answer, I tried to introduce about the reason for the reported behavior and how one can debug and determine the root cause. Unfortunately, this requires an extensive debugging knowledge and time to isolate the problem.

Alternatively, Process Monitor can some handy to give a high level understanding of the problem, which as a User would post possibly need.

Tools Required

1. Process Monitor

Steps to Debug

1. Run Process Monitor

2. Add the following filters (Cntrl + F)

   1. Process Name - begins with - python
   2. Operation - begins with - CreateFile

   

3. Now keep running procmon, until your application Crashes
4. Stop Capture (Cntrl + E)

5. Search the LOG for a call to WerFault.exe

   

6. Gradually scroll up to see the last called Non Windows DLL which may be related to Python. In the above case, its abort_dll.dll.

7. Now use your Python library knowledge, or ask across (including SO), to determine, what could be the failing. Even, from the log, you can identify, which Python Module called this DLL by scrolling further up.