The faultcode subelement

The faultcode subelement can take the following error values:

Error Value
Description
VersionMismatch Indicates that an invalid namespace for the Envelope element was found
MustUnderstand Indicates that an element with the mustUnderstand attribute set to 1 was not understood
Client Indicates that the message was incorrectly formed or contained incorrect information
Server Indicates that the message could not be processed due to a server problem
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