ntdll.dll error with method rtlUpperChar

[tang]

I have one vb ATSCOMTest.exe file which will connect to ATS server which is developed with java. This ATSCOMTest.exe file will submit the xml request to the ATS server and gets the response. when double click the ATSCOMTest.exe file it opens successfully, while trying to connect to the ATS server by entering the host name and port number, the COMTest.exe application what abnormally closed.

In the event viewer the following log was displaying

The application, D:\ACBS\ATS\bin\ATSCOMTest.exe, generated an application error The error occurred on 07/30/2008 @ 12:34:51.227 The exception generated was c0000005 at address 7C80EEF0 (ntdll!RtlUpperChar)

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Faulting application ATSCOMTest.exe, version 1.0.0.0, faulting module ntdll.dll, version 5.2.3790.3959, fault address 0x0000eef0.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

The environment is: win oS - version win2003srv enterprise edition sp2

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