Standard Cost Rollup Erroring out

Hi,

I ran the Std cost rollup process for my Item, Calendar and Cost type. It started erroring out.  But, when I ran the Cost rollup using different calendar with the cost type, it works good.

I setup the calendar 12 months period ( all periods are open) and assigned to standard cost type. For me the Calendar and Cost type looks good.  I dont' think item is a problem because it works in a different calendar. But, I don't know, why the cost rollup process is failing?. Do we need to setup anything additional apart from Cost Type and Cost Calendar?. Infact, I set the Source Rollup setup too. But, It didnt help.