RMA Credit throws date invalid errors @ R42800

Hello:

Sales Update is generating the following for a Credit order created through RMA processing.

Invoice date is valid, GL date is valid.  Associated Lots/Serial Numbers appear to be correctly set and within appropriate dates.

There are two invoices for the credit order.  All but one line was received and processed through invoice, then the final line was received and processed, generating another invoice #.

Typical sales update settings for AR & GL date are from Invoice Date.  Tried running by keying specific dates for AR and GL, got same date error results.  Checked financial months and they appear to be correct.