Mass change contract MEMASSCONTRACT

Hello Gurus,

We have a requirement where in we need mass update of contracts.

I know there is a SAP standard mass transaction MEMASSCONTRACT which can help us achieve our objective. But while trying out the transaction, i found few fields like currency, material group could not be changed using this transaction.

I want to know is there a way to findout the list of fields that can be and cannot be changed using this transaction? This list is important as this will enable us to take a decision whether we need a Z-transaction to update the contracts.

For eg. for mass transaction MEMASSPO, there is a FM ME_LIMIT_FIELDS_PO where i can find fields that cannot be changed using MEMASSPO. So is there any FM or anything similar for MEMASSCONTRACT?

Any suggestions?

Thanks,

Ritesh