OKEP settings

Hi,

Hi Team,

Our client is getting this error message number:FI660
"Maintain Default cost element in controlling area 1000" while trying to clear
the vendor using transaction F-44.They are basically trying to clear the Down
payment against the Vendor invoice.

Please can anyone help us understand what is the business need for this setting and which GL account(nature) to should be put in here.

I have already read the posts on this topic but none of them explains from business perspective what to put in here.

Many thanks.