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You need to explain better what is happening in your code. With only a pic and the error code we can't help further.
By the way you can edit the class %SOAP.WebClient.cls in your STUDIO and debug the line +205 to check what is happening when you do your web call. You can watch the %objlasterror or $ZE["ZSOAP"] to check more info about the error. (See caché documentation about that).
From your print you should work on Hermes Pardini IT, right? You can contact me if you need more support in Brazil.
Cya.