Are you getting this error while trying to monitoring services through Monitor/MWS?
This is a configuration issue. Apply the latest PRT fix available on advantage.
or or you getting this error while invoking a webservice?
session caching issue of soapRPC.(Check advantage for more info it is a known issue)
If the issue still exists then try watt.server.SOAP.enforceMsgPartNS = “false”, this will allow the non-namespace qualified elements to be permitted.
#Flow-and-Java-services#Integration-Server-and-ESB#webMethods