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Asked: 2026-05-15T18:54:27+00:00

I have a C# application that communicates with an SAP function module via a

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I have a C# application that communicates with an SAP function module via a an XI/PI web service.

My C# code is using a Visual Studio-generated WCF proxy (generated via the Visual Studio "Add Service Reference…" wizard.

I’m getting a System.ServiceModel.FaultException with the message

CX_ST_MATCH_ELEMENT:XSLT exception.System expected element ‘EReturn’

"EReturn" is an array that’s used by the response from the function module, but not used for input. I was able to leave this field null with the old webMethods service. Is this message telling me that I need to initialize it for the XI service?

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1 Answer

  1. Editorial Team

    Yes, Brian, that’s what the message means (I initialized to an empty array, and the error went away.)

    You have to initialize all complex objects.

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