Regarding Background job corruption

Dear Guru,

We are using SOP (Planning Info Structure ) and doing forecast to material in T/Code MC94. Afterwards we transfer the Sales plan (Active version ) to Demand management by executing Background job. Job has been created through T/Code MC8E. And then executed in T/Code MC8G.

But Background Job is getting corruption after certain time. It goes fail. So that quantity is not reflecting in MD63..Pls suggest...

Thanks in advance..!!!

Deepak