Cost Center Updation in Tab "Location" - Account Assignment.

Hi Experts

In Plant Maintenance Order there is a Tab Called "Location" - Account Assignment.

For Some Order Types the Cost Center is getting updated on theabove mentioed tab. For few Order Types it is not.

Can any one let me know the reason Why it is not getting updated.

Also if i change the Cost Center number in the above mentioed tab the Cost Center is not getting updated in the Settlement Receiver.

Regards

Venki.