Material validation

Question

Hi,
I have written a user exit prgram for material validation. I.e we maniatin a seprate "z" table, where the 'z' table contains filed like material code, wbs element & material price. when i create a P.O then it should check whether that material exit in table. if that material exits then P.O should be saved or else it should display a message that material not mainatined in table.
Our Scenerio as follows
  "z" is will be like
WBS element                  MAterial                           Price
cbb.009                               ABC                                11
cbb.009                               DEF                                  12
Now if i create a P.O with material ABC And WBS element cbb.009 P.O should be saved. And when i create a P.O with WBS cbb.009 with material GHI (which is not in table for WBS cbb.009) an error msg a 'material not mainatined' should come.
For this i have used a user exit MM06E005 and Function exit EXIT_SAPMM06E_017.
And now the issue is when i create a P.O with material whcih exist in the table  it is allowing me to Save the P.O. And when i delete the material code and enter a material code which is not in the 'z' table it's not displaying the error msg but when i change any other field than material code its showing the error message. When i set the break point in pgm and check the material field is not getting changed when i change the material in P.O but when i chnage either Qty,plant or price it getting updated.
But for me when i change the material code itself it should be changed in the material code field.
EVEN I TREID WITH CLEAR,REFERESH COMMANDS. BUT STILL ITS NOT SOLVEING MY PROBLEM
And Regarding this issue i have posted many threads in SDN but i have not got any correct solution.
Pls guide me to this issue and help
Thanks
Regards
Dinesh

Answer 1

Hello Dinesh,
It seems you are in wrong forum. Try to post in Technical forums to get the appropriate solution
Umakanth