Planeed order not created

Hi experts,

I am facing a problem, while taking the MRP run. The planned orders of some of the materials are not created if I takes the MRP run through MD01, but the same is created if I takes the run through MD02.

Can anybody tell me what would be the error due to which it is not creating. Request your help in this regards.

Thanks in advance!!!

Regards,

Vijay Chavan.