webMethods Enterprise Adapter - Siebel Edition 4.2.1 using S

Does anyone use this adapter with Siebel 7 to query data using a ‘Java Thin Client’ connection ?
I am always getting an error when querying an MVL: QueryOperationJImpl.setRepositoryContext - Account.invokeMethod(SetRepositoryContext,Siebel Repository) failed, throwing a SiebelException: code(28455).
Anyone faced this before ?
Thanks for your help.

try to recompile the Siebel Business object and put the latest SRF file in server and again see the