F4 help is not working for display of Sales Order va03, VBAK- VKGRP
F4 help is not working for 2-3 users in VA03 transaction for Sales Group field.
Instead of showing Sales Group maintained in system , it POPS UP " NO VALUES SELECTED", MAINTAIN ENTRIES?."
Issue with 2-3 users , but for same users working fine in VA02 transaction .
Checked & compared SU3, SU01D etc .
What is missing