Scheduling lines In MD04 - MDBS/MD41

Hı PP Guru's

I have a problem with MPS - Total planning run. In our company when we run MPS (in t.c. MDBS ) mrp does not create scheduling lines for some external procured materials. But if we run mrp for one material in t.c. MD41 it creates scheduling lines. We faced this problem especially the materials these belong to one scheduling agreement. I dont think the problem is about scheduling agreement.

Bye the way when i examined the log of the MDBS i see that these materials are not included in in this run. I think the problems is that. I have to find a way to include these materials in MDBS run. But how??

Could you please halp me?

Thank indeed for your kind helps.

Evren Temiz