User exit for component data in ME21n/ME22n

Question

Hello,
I have a requirement to issue an error message if a component quantity is not evenly divisible by the end item quantity.  The component data (BOM) is entered after clicking the components button on ME21n/ME22n at the item level detail.  I need to evaluate the data after a user clicks save, but I cannot find a user exit where the data is passed into, or where it is defined as global data where I can reference it in a user exit.  The data is stored on the screen in structure MDPM and stored in the database in table RESB.
I appreciate any help,
David

Answer 1

Thanks for pointing me in the right direction.
I was able to put my code in EXIT_SAPMM06E_012 and retrieve the component data through (SAPLEINK)XMDPM[]
Below is the code I used to assign the data to be able to evaluate it.
FIELD-SYMBOLS: <z_mdpm_x> TYPE ANY.
DATA: i_mdpm_x TYPE STANDARD TABLE OF MDPM_X.
Fetching Component data
  ASSIGN ('(SAPLEINK)XMDPM[]') to <z_mdpm_x>.
  CHECK sy-subrc = 0.
Assigning data into an internal table
  i_mdpm_x[] = <z_mdpm_x>.
  CHECK i_mdpm_x[] IS NOT INITIAL.
David
Edited by: David Herrema on Oct 20, 2010 3:03 PM