ORA-06599: unsupported LOB operation in RPC call
Cause:
An attempt was made to perform certain large object (LOB) date type operations (for example, deep copying of a temporary or abstract LOB on the client side) while performing a remote procedural call (RPC). This is not currently supported.
Action:
Perform the LOB operation in question before starting the RPC. Or, perform those LOB operations on the server side instead of the client side.