MSVCR80.dll crash

Anyone cast any light on this, I've got an app running C#/.Net which is calling out to a COM component, and it keeps running for a bit, then crashing with an exception in MSVCR80.dll . I've tried this on several different PC's with Vista/Win7/Win8.1 all with the same problem.
Any ideas?
Silas2Asked:
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evilrixSenior Software Engineer (Avast)Commented:
You've not made it clear if you are a developer or a user. If you are a developer:

Step 1: generate a dump file
Step 2: use something like WinDBG to analyse the dump file to see what is causing the crash

https://support.microsoft.com/en-us/kb/931673
http://www.windbg.org/
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Silas2Author Commented:
Sorry, been very tied up, but this is still an issue (its just a process I only run once a month), but I am going to get the dump.
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