third party control account error

Hi ..

PRC: Create Accounting reflects the error 95301(The account code combination on line 3 is a third party control account. Third party control accounts can be used only when theapplication is enabled to use control accounts. Please select a different account or update the account to indicate that it is a third party control account for the application Projects.) Where is this action done? "update the account to indicate that it is a third party control account for the application Projects" Is it a setup done at Projects side? At GL side I see the natural account with the qualifier "Third Party Cntrol Acount" = Yes