"Invalid Soap Action" when calling web service in WinXP SP2 but OK in Win2k  
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Bill Cumming





PostPosted: ASMX Web Services and XML Serialization, "Invalid Soap Action" when calling web service in WinXP SP2 but OK in Win2k Top

My coworker has written a simple web service that I communicate with from my unmanaged C++ app using the CSoapSocketClientT<ZEvtSyncSocket> ATL template class. The interactions all include a SOAP action and SOAP message, and it works fine when my app is on my WinXP SP2 development box calling the web service installed on a Win2k box. However, when calling the same web service running on my WinXP box locally or my coworker's WinXP box, I get the message "Unable to handle request without a valid action parameter. Please supply a valid soap action."

I used the same web service installer and the same calling app in all 3 cases. I tried turning off the WinXP firewall and still got the same result. I'm suspecting something in the .Net security configuration. Any ideas



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