AR: Gapless transaction numbers not so gapless...

Hi,

We are currently on R12.1.3, and have setup gapless transaction numbers in AR for some of our Orgs. 

Instead of using Document Numbers, we use the transaction number instead.   This is done by turning off the ability to delete transactions and change the sequence cache to pull one number at a time.   There are only a small number of invoices so there is no performance issues with doing this.   But we found it is possible to drop numbers.

As you know after entering the header information, and clicking on "lines" the system generates the next transaction number.    But if you either exit the system or quit without saving at this point, you loose the record and the transaction number.