Payables Transfer to General Ledger does not kick off Journal Import

Hello,

This is on 11.5.10.2.

We have some invoice batches that are not posted in GL.  This problem is sporadic and only happens for some batches and not all.  It is unclear to why some batches are posted fine and others are not.

The problem is at payable trasnfer to General Ledger program.  After these batches are validated and create accounting has been executed successfully,  we submit Payables Trsnfer to General Ledger program. 

This program does not kick of Journal Import child process for these batches.  It just completes normally without showing any error detail on log/output.

What could be the reason? Why Payables Transfer to General Ledger is not kicking off Journal Import for these batches?