more based() %addr array questions!!! POINTER NOT REFERENCED!

Now I'm really confused.

I'm just now getting around to testing what I thought was a sound solution
to my redefining data structure fields as an array.  here is the code:

DDSINPUT        E DS                  EXTNAME(DSUPDPAG)inz

 * dsupdpag has QZAMT1-12 and QZCHK1-12 defined.

D $QzAmtBase      S               *   inz(%addr(QZAMT1))
D $QzAmt          S                   like(QZAMT1) based($QzAmtBase)
D                                      dim(12)
D $QzChkBase      S               *   inz(%addr(QZCHK1))
D $QzChk          S                   like(QZCHK1 ) based($QxChkBase)
D                                      dim(12)

DSINPUT just happens to be a parameter to the web API QtmhCvtDb.

On the first reference to $QzAmt() in the calcs, I'm getting a RNQ0222 -
Pointer or parameter error (C G D F).

Cause . . . . . :   RPG procedure WWUPDPAG in program WEB/WWUPDPAG at
  statement 1220 had an error due to a pointer not being correctly set. The
  cause of the error is most likely one of the following:
    -- A basing pointer was not set.
 (etc.)

Why would my pointer not be set?  Is the fact that my data structure is
part of a PList to another program causing me trouble?

any other suggestions?

thanks

Rick