Could not create SAP cluster Group

Hii Experts,

I am getting error "Could not create SAP cluster Group Error:1" while installing Installing the first cluster Node on ECC 6.0 NW 7.0 SR1.I know the Netweaver version is too old  but the client insists on the current version. I tried creating the cluster group manually and proceed but  still getting the issue. Not sure what the problem is.Any help would be appreciated.

Thanks and Regards,

Venkatesh Iyer