JNLTPNEST, Mupip journal command found nested TP transactions for journal file jjjj at offset oooo at transaction number nnnn
MUPIP Warning: MUPIP JOURNAL -RECOVER or ROLLBACK encountered a TSTART record for transaction nnnn at offset oooo in journal file jjjj while already processing an uncommitted transaction. Since the run-time system should never produce this situation, the journal file is suspect. MUPIP discards the in-progress transaction and proceeds.
Action: Extract the journal file(s) and use the context from the message to find the transactions in question and adjust for any lost or tangled transaction(s).