The bank and ap checks are out of sync. Could be a number of reasons. The remit contains special characters or the vendor code doesn't match. 

We can assist. [email protected] 

Look in BKTRAND for reverse apostrophe's ` in IDREMIT which have come across from the A/R Receipt where users have accidentally hit ` instead of tab during data entry - it happens more often then you might think.  Has a customer number change been run between Receipt creation and Bank Rec posting?  If its not something simple like this then it could be a more time-intensive data-repair as MusickInt implies.

i am getting  this information

I agree with MusickInt, this likely needs professional support.  Could be partially cleared data - i.e. clearing process started then Sage 300 terminated before it completed, a number change gone wrong, an integration that makes changes to the database, a bad import etc.  See if you can identify any unusual processes users ran during the last bank rec you can communicate to the consultant.  All the best!