The thin reclaim is currently not supported if volume has instant snapshots.  The above command initiates thin-reclaim through the DRYRUN iohint which is not really perform any thin-reclaim, but try to leverage the reclaim infrastructure to get current filesystem usage.   Within vxio kernel, the DRYRUN iohint should not be processed for incomplete snapshot volume.  

A fix for this issue is contained within Storage Foundation 6.0.3.

Visit the SORT Patch Finder to download this patch

https://sort.Veritas.com/patch/finder/?prod=sfha&plat=unix

As a work-around, disable thin-reclaim on the incomplete snapshot volume. This can be done by find all the thin disks, and running the commands below to disable thin-reclaim.

# vxdisk set thin=off

# vxdisk set reclaim=off

For example:

for DISK in `vxdisk list | awk '/thin/ { print $1}'`

do

  vxdisk set $DISK reclaim=off thin=off

done