Wednesday 16 September 2009

InfoPath 2007 - Issue when adding Web Reference in Code Behind to SAP Enterprise Service

There is a bug when adding Web References to secured WSDL files in InfoPath 2007 Code (in Visual Studio Tools for Applications aka VSTA). For example, I received the following error when adding a Web eference to a SAP enterprise service:

Unable to cast COM object of type 'System.__ComObject' to interface type 'EnvDTE.IVsExtensibility'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{3C536122-57B1-46DE-AB34-ACC524140093}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

The simple fix is to save the wsdl file to your local file system e.g. C:\mySavedWSDL.wsdl) and use that wsdl file as a reference rather than pointing to the secured HTTP location for your WSDL source.

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