Hi Peter,
The project that can be used as receiver in cost distribution rule is of type Direct cost projects and Multi-customer projects
In case of customer projects : Costs are always posted as deferred costs which are not subject to cost distribution and revenues are posted to the sales order directly.So there would not be any real costs or revenues to be found on the customer project either.
In case of Overhead Projects : These are always immediately settled not leaving any costs to be assessed. Because of the instant settlement of costs to the requesting cost center at the time when the primary posting is made there is no net amount left for distribution on such a project at the end of the month.
Thanks
Lokesh Sharma