Re: Redefining input parms into an array

I have a command processing program I'm writing in RPG.  I have 3 fixed parms and then a recurring pair of parms (20 pair).

I'm having problems getting a redefine to work on the PR/PI.

dcl-ds dsParms_T template;
ParmIn char(10);
ParmOut char(50);
end-ds;

dcl-pr (or pi)har(1);
  ReqdParm1 char(1);
  ReqdParm2 char(2);
  ReqdParm3 char(4);
OptionalParm01_1 char(10);
OptionalParm01_2 char(50);
// repeat...
OptionalParm20_1 char(10);
OptionalParm20_2 char(50);
dsParms likeds(dsParms_T) dim(20) pos(8);
end-pr (or pi)

I'm getting RNF3748 - Keyword not allowed on the dsParms. Does not like the POS() keyword.

I need to specify the individual parms as I'm using CEETSTA to determine which were passed.
Any suggestions? I guess I could change the command to pass blanks or something if unspecified.

Thanks.