my $vmstr = "zldcdyh1bdce2d14-vcc-voipohdr-correlator-00";
    my ($digits) = $vmstr =~ /-(\d\d)$/;
    my $VMinst   = "/instance-$digits";
    is $instance, '/instance-00';
    my $SRC_DIR         = "$VTIERBASE/pvc/ohdr/topology";
    #my $TOP_DIR        =  "$VTIERBASE/pvc/ohdr/instance-0/preprocess";
    my $TOP_DIR        =  "$VTIERBASE/pvc/ohdr/VMinst/preprocess";