Issue
 When voiding a cheque, using either the Reverse Entry or the Reverse Entry and Offset Purchase Invoice option, the following message appears:

Unapplied must be No in Detailed Vendor Ledg. Entry Entry No.='213432'
Solution
 Explanation:
The problem is caused when a user unapplies the payment in the Vendor Ledger Entries, then reapplies the payment.  The program is designed to look only at the original application of entries with these reversing options. If the original entries have been Unapplied, then the Void Only option is the only option that is available for voiding checks that have previously been unapplied.

When voiding the payment, select the Void Cheque Only option.  And manually enter a credit memo, if necessary.