Rhino, Grasshopper Automation Problem

Hi to all,

I have created an automation in Grasshopper with Python, that render pictures with Vray.

But I have Problem. Rhino crashes at different points (frame number) every time.

Problem signature:
Problem Event Name: APPCRASH
Application Name: Rhino.exe
Application Version: 5.8.40311.7545
Application Timestamp: 531ecb6b
Fault Module Name: clr.dll
Fault Module Version: 4.5.27.0
Fault Module Timestamp: 545ca861
Exception Code: c0000005
Exception Offset: 000000000056c09c
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033
Additional Information 1: 997a
Additional Information 2: 997a4ff11362d5660c44f04802e88491
Additional Information 3: e4a8
Additional Information 4: e4a854891534e3bf1f073d21c67662e6

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It seems that the problem is between Rhino and .Net Framework.

Can somebody tell me how to solve this problem.

Thank you in advance.