ORA-23621: Operation corresponding to script string is in progress
Cause: The script was already being run in a different session or was terminated before status for the script was updated to ERROR or EXECUTED
Action: Make sure the script is not being run in a parallel session. Then call the RECOVER_OPERATION API in the DBMS_STREAMS_ADM package with the appropriate OPERATION_MODE argument
https://support.oracle.com/
http://www.oracle.com/