RNF0571 The second parameter of LOOKUP is not valid

Jon,

Thanks for the info. In this scenario:

dcl-ds MyDS;
Group Dim(99);
Fld1 char(4) Overlay(Group);
Fld2 char(20) Overlay(Group: *Next);
end-ds;

index <http://archive.midrange.com/rpg400-l/201411/msg00008.html#> -
%LookUp( searchText: Fld2); // This should do it.

how then would I be able to refer to an individual instance of the array?
I'm trying different options and having some difficulty. So say I wanted
to load up the first instance of the array, both fields Fld1 and Fld2, with
data - how would I refer to them?

Fld1(someindexvalue) = data?


Thanks!

Bill