Unrecoverable Error Detected when Updating Invoice

When updating invoice in Modify Invoice, error generating stating Unrecoverable Error Detected, Munis has detected an unrecoverable error this program will abort after you close this message Error condition: Must be 'Y', 'N', 'U', or 'M'

EERP

Modify Invoices

Invalid or blank entry in line field A - Is this a capital asset?

Enter a valid code from the list: Y, N, U, or M

If not able to update the code in Modify Invoice, contact Financials Support.