Great! I've had this many times before so I thought I would ask.
Opening the files again they now all seem to display in the current (correct metric) units.
(Now that I've done all the work !!)
Seems it's another bug....er new feature in 2012.
Yes Measurement is set to 1
DDUNits & units all show metric settings only.
For the record I've attached an image showing where the error occurs. Perhaps it's when first opening a 2009 file and working through updating all the materials although this file was saved and opened several times (crash) during the process without it updating the units correctly. I would think that's where the error is occurring.
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