Forecasting Background job

Hi Gurus,

We run the S&OP forecasting background job once a month using RMCA0766 but everytime it runs the next month one fails. I wasnt able to find it why it fails. But if I run job using MC8G transaction manually it tells to reset the status to run it next time. I would like to know what is the correct procedure to run this program in the background whethring using RMCA0766 or MC8G. Also do we need to reset the status every month to run again. Can someone please guide me on that.

I would really appreciate if someone could throw some insights on it.

thanks

Babu