Updating Price List Parts

[Shizar115 (Shizar)]

Seriously this is my last suggestion

Check the case (Capital or Small) of Key columns
I found it here:

"PartNum is a key column and cannot be changed" DMT error

I have ran into this as well and figured out that it is case sensitive. If the existing partnum is “ABCDE” and you try to update using partnum “abcde”, it will give you that error.