please somebody solve my probleam

hi ,everybody

my reqirement regarding a exit related to pp module.

exit name:M61X0001.

tr, name:md01

Restriction of material selection during the MRP run.when MRP run is executed a plant level,material requirement planning is excuted for all the material in the plant.

it is not advisable and may not be necessary to execute MRP run for all the materials in the plant,as materials may have different frequency for MRP execution.This exit is used in tr. code MD01.

please help me....