Modify channel properties

Hello:

I have a dataset where most of the channels are unit-less. There is one channel that I want to define it's Unit properties as meters (m) in vbscript. Sounds simple, but not having much luck.

Tried this:

Call ChnPropSet("[4]/DTC", "/DTC", "m") '...Set Units

...And this

Call ChnPropValSet("[4]/DTC", "unit_string", "m") '...Set Unit

...Also

Call RootPropValSet("Unit", "m") '...Don't see where a channel is defined

I can manually set the unit to meters in the Data Portal with no trouble.

Thanks!

Steve