Hello Ayaskant,
There is a conversion routine assigned to the product field in transaction /SAPAPO/RRP3.
Conversion routine "CONVERSION_EXIT_PRODU_INPUT" is used.
Check the below example, if i enter leading zeroes the conversion routine is converting into input format with the same number of leading zeroes.
SAP has provided a BADI "/SAPAPO/PRODU_CONVEX" to overcome this.
Go to SE18 and do the BADI implementation, inside the method "INPUT_POST_EXIT" do the below coding,
SHIFT EV_MATNR LEFT DELETING LEADING '0'.
I tried and it worked for me.
Regards,
TP