Multi-dimensional array initialization help.

I need an extra set of eyes please...

I have this datastructure set up so that I may use multi-dimensional
arrays, however, I can't get the program to work. Keep getting blanks in
the datastructure instead of zeros.

D LY              C                   1
D TY              C                   2
D Unit            C                   1
D Area            C                   2
D Regn            C                   3
D Comp            C                   4

D Year            DS                  Qualified Dim(2) Inz
D  Location                           LikeDS(Variables) DIM(4) Inz

D Variables       DS                  Qualified Inz
D  Terms                              Like(HTOTOT) Inz
D  ServiceA                           Like(HTOSVA) Inz
D  ServiceB                           Like(HTOSVB) Inz
D  ServiceC                           Like(HTOSVC) Inz
D  ServiceD                           Like(HTOSVD) Inz
D  ServiceE                           Like(HTOSVE) Inz
D  ServiceH                           Like(HTOSVH) Inz
D  FTTerms                            Like(HTOFT)  Inz
D  PBTerms                            Like(HTOPB)  Inz
D  PTTerms                            Like(HTOPT)  Inz
D  Active                             Like(HTOACT) Inz
D  FTActive                           Like(HTOAFT) Inz
D  PBActive                           Like(HTOAPB) Inz
D  PTActive                           Like(HTOAPT) Inz
D  TOP                           4  1              Inz
D  TOPB                          4  1              Inz
D  FTTOP                         4  1              Inz
D  PBTOP                         4  1              Inz
D  PTTOP                         4  1              Inz
D  UMAMT                        17  2              Inz

D CUPHTO        E DS                  Inz

The program compiles just fine however; when I get to the point of
populating the array, I get a data-decimal error.

/Free
  Year(TY).Location(Unit) = *Zeros;
  Year(LY).Location(Unit) = *Zeros;
  For Period.Period = RangeBeg.Period To RangeEnd.Period;
      If Period.Mnth > 12;
         Period.Mnth = 1;
         Period.Year += 1;
      EndIf;
      HTOUNT = %SubSt(%EditC(Location:'X'):3:4) + ' ';
      Chain (Company:HTOUNT:Period.Period) CULHTO;
      If not %Found(CULHTO);
         Reset CUPHTO;
      EndIf;

      Year(TY).Location(Unit).Terms += HTOTOT;  // Errors Here
      ...
/End-Free

When it gets to this point, I get the error.  Trying to Add HTOTOT to
blanks.  Can you see what I'm missing?  I thought on the very first line, I
set everything to *Zeros.  NOTE: that I also tried changing that to *ALL'0'