JDBC / ADF Error

Hi All

i'm getting the following error when trying to process messages via a JDBC driver

Delivering to channel: CC_JDBC_Debt_Details_In

Exception caught by adapter framework: Exception thrown in method process. The transaction is marked for rollback.

1173952020134 Delivery of the message to the application using connection AFW failed, due to: Exception thrown in method process. The transaction is marked for rollback..

Anyone got any ideas at all, the Interfaces have worked OK in the past but have started failing and i can't work out why

Regards

James