APP Open Item Not cleared

Hi All,

I have strange issue. automatic payment run is executed and after that i have messgae

Posting orders: 23 generated, 22 completed

i have 23 clearing document but one document which is generated its not cleared the open item and even am not finding that

document no in FB03 t code.

can you give give me your overview on this issue

"Posting orders: 23 generated, 22 completed" : Why this type of messgage genarated and what will be the reason

Thank you