Gee I didn't think that many of us were working this weekend! Yes, @PhilMcIntosh this is an import to update existing PO lines. The client made a change to both the product lines and to post by warehouse in the accounts associated with it. So, existing PO lines had to have their GL account updated, which was easy enough to import. The issue now is we have the correct GL but the product line field is wrong. That wouldn't be such a big issue if the warehouse code was correct. This is a conversion and old warehouse codes weren't all defined prior to initial import, so the users are changing the warehouse codes as needed. Okay you say, well guess what, on these lines with the old product line when you change the warehouse code the GL account changes too, so now the import of the GL account is useless on these line unless I can change/correct the product line too.
The kicker - SO details doesn't imbed the product line so when the product lines were reassigned at the item level, SO details displays the new product line and all that was needed was to import the updated GL account for sales and COS.
It would be, and maybe has to be, that I export and re-import as @ThereseLogeais suggests. It's a pain - why PO details ODBC clearly shows the product line field but the dang VI import fields have it missing!