Keith,

Sorry that I cannot help you on using virtual dmis to measure a pattern. I recently sent a note to Henri Bosch asking about this and he replied, 'Virtual DMIS at it's current level does not suppport FEAT/PATERN nor
TOL/COMPOS. If this is "mission critical", I can submit an enhancement
request. Please let me know."

So, you may want to drop him a note and let him know.

Bob Connors
Lawrence Berkeley National Lab