Incorrect value: Unknown Namespace http://www.w3.org/2001/XMLSchema

Dear Experts,

         When i use sap to call .net web service , it occurs error:

Proxy-Generierung: Fehler aufgetreten

Incorrect value: Entity "<<document>>"(116 /4405 ). end tag 'ul' does not match begin tag 'p'

Proxy-Generierung: Fehler aufgetreten

Exception occurred in library handler

Incorrect value: Unknown Namespace http://www.w3.org/2001/XMLSchema

Could you please tell me reason?

Best Regards,

merry