Can someone explain to me everything about the bank account Reconciliations, what can be done by this function along with the case. thx before
You use the Bank Acc. Reconciliation window to check the entries and the balance on your accounts against a statement from the bank.
The window contains a header, where you enter information about the bank account and the bank statement, and lines, where you do the actual reconciliation by entering and adjusting the posted transactions and the transactions on the bank statement until they agree with one another. When you are finished making adjustments, you must post the reconciliation.
can be explained with a case in point? and the steps to resolve the NAV for the case that you provide?
You have to read Finance for better understanding of bank reconciliation
Attaching one document Just have look at it.
Bank Reconciliation.pdf (32.7 KB)
You have to put values of balance last statement and statement ending balance
As well as you have to reconcile the bank statement balance and your system balance. Once it is matched then only u can post.
Thanks Amol for attchment had u sent… thanks a lot… 
And Thanks to all of you … i know now…
Please verify amol’s reply if it helps you