If you're on 4.4, I believe you need 2 or 3 imports to complete your goal.  Dawn posted some information about this a while ago.

I'm on version 4.4

Let me see if I can dig something out from earlier posts, thanks.

Here is the fix from Dawn's message:

In order to import primary vendors in CI item, you need to have 3 pass import.

1. Create an import to CI item without primary vendor field.

2. Second import needs to be created to import to Im_itemvendor with below fields

o ItemCode

o APDivisionNo

o VendorNo

3. A third import goes to CI item to update the primary vendor with below fields

o ItemCode

o PrimaryAPDivisionNo

o PrimaryVendorNo

I am having the same problem, however we don't use AP Vendor Division Numbers, so what would I do in order for it to pass, and import correctly?

You would import "00" into the Division number as an assigned value.

That worked!! Thanks!!!!

I spoke too soon.  The import passed, but it did not populate the primary vendor field on Item Maintenance screen for those items.  The Vendor is now selectable with the flashlight tool, but it didn't auto populate that field.  Did I do something incorrectly?

Did you default the Division number in both imports?

Forgot to the 3rd import.  Thank you!!