Thanks for replying.
Sage also indicates to change field 30 in the AR Customer file. Import should not be an issue as it is one of the default fields that show up when importing to the AR_Customer file.
In AR_OpenInvoice, they want records with InvoiceType$ = BF changed to ""IN"" and Records with PY changed to ""PP"".
In AR_TransactionPaymentHistory, they want records with Field 4 - InvoiceType$ = BF values changed to ""IN"" and Field 10 Transaction Type$ changed to ""I"".
For records with Field 4 InvoiceType$ = PY they want the value changed to '""PP"" and Field 10 Transaction Type$ changed to ""X"".
In AR_AlternateInvoice, they want any records with Field 6 InvoiceType$ = BF changed to ""IN"".
Because the InvoiceType field is Part of the key in these files, I'm thinking in each case I will need to Export the file, modify, reinitialize old file and import back.
I haven't given a lot of thought as to what effect not changing the last three files would have. In the past I have hand edited the occasional record that popped up when AR got set to mixed. In this case, I inherited a client with the whole customer data base set to BF and one of the first things they complained about was the lousy Sage 100 Statement.
I am going to try the export/import route and if I come up with a kit of tools that work, I will upload it.