Hi Rishi,
Message - FB727 says There are no transactions that have this amount's plus or minus sign
While assigning the Business transactions to posting rules you may specified the +/- symbol to Incoming payments. Similarly while entering the amounts use the symbols.
Eg: If the amount CHQ deposit (Incoming Payment) : +XXXX
If the amount CHQ Issue (Out Going Payment) : - XXXX
If the amount Bank Charge (Expense-Outgoing) : - XXXX
Then you will not get this error.