ORA-28576: lost RPC connection to external procedure agent
Cause: of this error is abnormal termination of the invoked "C" routine. If this is not the case, check for network problems. Correct the problem if you find it. If all components appear to be normal but the problem persists, the problem could be an internal logic error in the RPC transfer code. Contact your customer support representative
Action: First check the 3GL code you are invoking; the most likely
https://support.oracle.com/
http://www.oracle.com/