ADSUBCON and ME2ON transaction

We are a manufacturing compnay and we are using ECC release 605, we are planning to use subcontracting scenario. I read about the new transaction ADSUBCON and ME2ON. based on the information i collected on the net i have activated the business set LOG_MM_SERNO.(via SFW5)

As said it should allow me to access the mentioned tcodes but it does not

After activation when i access the ADSUBCON, it gives me a dump and it is not recognising the ME2ON tcode and

Dump briefing:

The current ABAP program "CL_ABAP_SWITCH================CP" had to be

terminated because one

of the statements could not be executed at runtime.

Is this business set deactivateble.

Can you please tell me what is the impact on other prorames and how to get this tcode up and running?