NetBackup 7.6.0.1 & EMC VNX Snapshots

Hi,

We've tried on a number of occasions to get NetBackup to perform VNX Snapshot (not SnapView) backups however whenever we try we get error 156 errors and get absolutely no where.

Has anyone any experience in using NetBackup and EMC VNX Snapshot backups and if so, how did you get it working?

I look forward to any help anyone can give

Thank you