[omniORB] Error,info: !pd_callDescriptor

[=?gb2312?B?emhhbmd5?=]

I use omniORB, sometimes my program exits during a long time running and prints the message as following: 

omniORB: Assertion failed. This indicates a bug in the application using omniORB, or maybe in omniORB itself. e.g. using the ORB after it has been shut down. 
file: ../../../../../src/lib/omniORB/orbcore/current.cc 
line: 135 
info: !pd_callDescriptor 
Aborted 


Could you tell me the reason and how to find or fix  the bug in the program ?
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