Hi Selva,
The OMCE settings is stored in table TCUCH-KZDCH.
0 Batch unique at plant level (MARC)
1 Batch unique at material level (MARA)
2 Batch unique at client level (MARA)
Since you can only select one level for batch unique, so you can either use MARA-XCHPF or MARC-XCHPF, not the two at the same time.
The difference between MARC-XCHAR and MARC-XCHPF has been explained by Jurgen.
You can check the following wiki on how to convert the batch unique level from client/material/plant.
FAQ during batch level conversion - Product Lifecycle Management - SCN Wiki
Best regards,
Tina