Tuesday 21 June 2016

Delphi error XML document must have a top level element. line 0

I have a Delphi application written in XE that consumes a WCF service written in C#, I have been receiving the following error message with one of the methods

XML document must have a top level element. line 0

I managed to fix the issue by making the method in the WCF Service return a value (boolean) if successful. It is possible Delphi does not like WCF Service methods that are one way ([OperationContract(IsOneWay = true)]).

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