Web Service Operation invocation fails

Web Service Operation invocation fails

There can be multiple reasons for that:

Symptom 1

1. View the defaultTrace
2. If the following exceptions appear, there is a problem in the request (parameters sent to server):

• XmlMarshalException
• XML Serialization Error

A mandatory parameter may be missing, or, a parameter may not fulfill schema restrictions (e.g. length, min/max values etc)

• Option 1: Validate the request sent to the server
  • 100% guarantee
  • Hard to achieve if the schema imports additional schemas (<xsd:import>)
  • Hard to achieve if more than 1 schema within <wsdl:types>
• Option 2: Compare to Metadata written to defaultTrace

Solution
Add the missing parameter, or, set its value to fulfill the restrictions

Symptom 2

1. View the defaultTrace
2. If the following exceptions appear, there is a problem in the response (sent by the server):

• XmlUnmarshalException
• XML Deserialization Error

Within service response, a mandatory parameter might be missing, or, a parameter might not fulfill schema restrictions (e.g. length, min/max values etc)

• Option 1: Validate the request sent to the server
  • 100% guarantee
  • Hard to achieve if the schema imports additional schemas (<xsd:import>)
  • Hard to achieve if more than 1 schema within <wsdl:types>
• Option 2: Compare to Metadata written to defaultTrace

Solution
Contact the web service provider to fix the server side.