Module pool-structure calling

Question

Hi experts,
INPUT
Plant (WERKS)
MRP Controller (MARC-DISPO)
DATE
OUT PUT
WORK SCHEDULE NO: MERGE(push button)
PLANNED ORDER NO
MATERIAL NO
MATERIAL DESCRIPTION
QUANTITY
SET
PRIORITY
WORK SCHEDULE NO: should be taken from req plan number (PLAF/PBIM-PBDNR)
PLANNED ORDER NO (PLAF-PLNUM)
MATERIAL NUMBER (PLAF-MATNR)
MATERIAL DESCRIPTION
QUANTITY (PLAF-GSMNG)
SET: here provision should be given to enter the numeric value (default it should be 1)
PRIORITY: provision should be given to enter the numeric value
MERGE: this can be a push button, which is used to merge two planned orders into one
here, i have created one structure.......and i called in internal table...
data: begin of spp occurs 0.
        include structure zsppmod.
data: end of spp.
data: begin of it_itab occurs 0,
      werks like marc-werks,
      dispo like marc-dispo,
      psttr like plaf-psttr,
      pbdnr like plaf-pbdnr,
      plnum like plaf-plnum,
      matnr like plaf-matnr,
      gsmng like plaf-gsmng,
      maktx like makt-maktx,
      p_set like zsppmod-pset,
      priority like zsppmod-priority,
end of it_itab.
  select single * from it_itab
   into spp
   where plant = zsppmod-werks
         mrpcontroller = zsppmod-dispo
         date = zsppmod-psttr.
endselect.
like this i called.....when i activate my prog i got one error
ERROR:
"IT_ITAB" is not defined in the ABAP Dictionary as a table, projection view or database view.          
how to call structure to internal table.....
plz help me.......
with regards,
Uma

Answer 1

Hi Uma,
Instead of using Select statement on Internal table u use MOVE CORRESPONDING <structure> TO <internal Table>.
awrd points if useful
Bhupal