No production activity in PPM?

Hi Gurus,

I need to create SNP PPMs from ECC routings.

The routing has a single operation in a single work center (with setup and production formulas in scheduling and capacity tabs). For some of the products, when the PP/DS PPM is created in APO by CIF the production activity is missing, so I cannot use it to create the SNP PPM (for other products it is ok). I checked the PP/DS PDS and it is created ok (both setup and production activities).

Is there a known reason for this? I looked for oss notes without any luck. Any help is more than welcomed.

regards,

J.