Just upgraded from 2014 to 2015 last week.
Hi John Bilow
In 2015 SW added zones to drawings and also to be able to call them as proeprties in the Rev table. Is your rev table customised from the previous version or did you set it up in SW15?
If it is from an old template, check your Service Pack, then just check the those columns and see that they aren't using the new Zone property - Image below shows a new column created and the "Zone" custom property shown.
Aside from that, contact your reseller or perhaps someone else can shed light.
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