Tolerance levels in Purchasing MM

Question

Dear All,
Can someone please give help me I am new with MM. The business what to set-up some tolerance levels in the purchasing side. I was able to find all the different tolerance levels available in Purchasing I chose BD, tolerance level at the invoice level total. In doing this the systems requires for an account so the difference line item gets posted. I end up using an existing account that we use for PPV. I set-up the tolerance level, I assigned t he account to Purchasing, but when I try to post an invoice I can see the the difference in the G/L account, but when I save it tells me that Account needs assignment to CO. Do I need to do anything?
1- This is an existing account that we use which already cost centers and profit centers are  posted.
2- Because a purchase order can have different profit centers at line item level, and this tolerance level is at header level, of course the system will ask me for a cost center, I bypass this by entering a default cost center at the account level, but this will not work if all posting will default to a default cost center. How can I set this right?
3- Is there a way that I can have the system look at the first line item pick the profit center available and enter the difference to that profit center?
Your help will be greatly appreciated.

Answer 1

Hi
For point 1, check OKB9 again to see any problem there. For eg have you ticked "Priority Business Area" or you have a ctivated Auto assignment at Co Code level or Co code+Business/Valuation area level, etc.
For point 3, please check whether in OKB9 for that Cost element (small differences), whether you have setup automatic account assignment at Profit center level.
Jayaram