The batch record was not created or there is a problem with the transaction.
When the transaction was entered in Cash Management, something occurred causing the batch record to not get created properly and the entry does not post. The batch number is on the transaction record but no batch record exists. Or the batch record may exist (i.e. it shows up in Ranges in CM Post Entries), but there may be other problems with the batch record or with the transaction that is part of that batch.
The posting journal may show error: "Empty Batch" or it may show "0 posted, 0 rejected".
Because the entry does not post, the transaction is not available in the Reconcile task when you do your bank reconciliation.