Yes. i.e. the output file needs to concatenate part of the item number and part of the description.
So I ""assumed"" the temp field operation is calculated, not assign.
When you do a field operation calculated, there is no position field.
However, if you do a field operation ""Assigned"", you do get a position field.
And you have the calculation field still available.
I'm testing now to see if doing an assign operation with a calculation produces the desired result.