No amount settled to CO-product - REM

Experts,

We have a scenario in REM like, an amount arises out of variances got not settled to CO-product but it settled  only to main product.

For info, we already maintained

1. CO-product indicator in material master and BoM.

2. -Ve norms against CO-product in BoM.

3 .Apportionment structure and its equivalence numbers.

Please support on how to split the settlement to both CO and main product ?

(We are in ECC 6 / EHP 6 and ML/Actual costing active.)

best regards,

Magesh