script failing with Can't load class 'HostSriovInfo' error

Hi all,

We just upgraded from RHEL5 to RHEL6 and attempted to load the SDK v6.  *SOME* of our standard perl scripts that gather inventory data from assorted vCenter servers are failing with the following error:

Can't load class 'HostSriovInfo' at /usr/local/share/perl5/VMware/VIMRuntime.pm line 52.

We are, however, able to run a connect.pl successfully to all vCenters with the same credentials.  Any ideas out there that might help us troubleshoot this?

Thanks,

-Mike Gray