Activity backflushing in REM

Hi,

We follow repetitive manufacturing for FERT materials with Prod version, Rate routing and Product cost Collector. In our REM profile for posting activities we have assigned the option 'Using data from prem. costing for prod. cost collector'. We are saving the preliminary cost estimate for prod cost collector periodically(including the activity cost). In this case while doing assembly backflushing for the FERT material the activities are not posted as per the values defined in the rate routing. Please let me know the reason for the same.

Regards,

Ravi Kumar C.