VXMake: import of diskgroup failling between 2 different versions of VxVM

Dear,

I'm trying to vxmake replicated (using BCV from EMC) diskgroups.

On the source system, vxvm is at version 6.0.1 with a FS layout 7.
The target is running VxVM 5.1SP1RP2 so the FS layout v7 should be alright.

During the import process, a vxmake is issues but it's complaining about these things:

VxVM vxmake ERROR V-5-1-327 variable name not recognized, context:

        thin=off      

        thinreclaim=off

May I safely remove these variable from the text file used for the import?

Thanks in advance for your help and advises.