Error in FEBAN

Hi

Situation is we have manual bank recon recently implemented.

In incoming a/c we posted a customer check 993 (assignment field)

Bank statement show check number 0992

Post statement through FF67. System didn’t knock off this entry due to mismatch of check number. But when I tried to post through FEBAN->other display->save system is showing following error:

Algorithm assign to incoming cheques is (015)

open item is there in the incoming bank account

I tried a lot and search a lot but couldn't find any solution can u guys plz help