%LOOKUP

Hi group

I am trying to use %LOOKUP.
I am reading 2 files.
File-1 has PO # which has 2 Finished Goods.
File-2 has 2 Finished Goods and each with 3 and 2 Raw items respectively.

I read File-1, get FG1, chain to File-2 and move Item to an array. This
goes on for 3 items of FG1. Here I use %LOOKUP to check if the item is
already in he array. Since the FG1 does not have duplicate items, LOOKUP
is ignored. When I read FG2, there may be an item which was also in FG1.
So I have to %LOOKUP in the array. Here LOOKUP works but %LOOKUP fails. I
use %LOOKUP because I want the posn in the array where item is found.

I have defined array as char 6 dim 99.

Any idea why %LOOKUP fails?

TIA
Deepak