tmnxVdoGrpSrcVqmCatErrSecs 1.3.6.1.4.1.6527.3.1.2.61.1.18.1.20

The value of tmnxVdoGrpSrcVqmCatErrSecs indicates the total number of CAT (Conditional Access Table) error seconds for the stream on this multicast channel.