Receivables Maintenance Worksheet Error 6050,117 - Items have not reached Operator Maximum Number of

A user received the following message on the Accounts Receivable > Receivables Maintenance > Maintenance Worksheet page when saving:   "One or more items on this worksheet haven't reached Operator maximum number of days (6050,117) To write off an item amount the maximum number of days must be reached since the entry accounting date for the item."

I searched the Oracle knowledge base and found some pages to review.  I looked at User Preferences Receivables Data Entry2 -write off days is equal to 0, Receivables Options - minimum days until writeoff is 0, the Customer General Information Bill to Options - days until writeoff is blank, and Automatic Entry Type Entry Reason - days until write off is 0.