Diagnosis
No preliminary costing can be found for a product cost collector.
You want to carry out a backflush for unvaluated make-to-order stockand, at the same time, the REM profile is set so that activity postingsare carried out on the basis of the preliminary costing for the productcost collector. However, no product cost collector exists forunvaluated make-to-order stock.

System Response
The system cannot determine any preliminary costing for a product costcollector and therefore cannot carry out the activity backflush.

Procedure
The process you set for unvaluated make-to-order stock is notcompatible with the settings for the activity backflush in the REMprofile.