Hi,
I'm having trouble with a compare & sync.
This is our current model workflow: DEV->UAT(deployed)->PROD(deployed)
I made a copy & archive of our PROD model. I changed the mode to standard and it is not deployed. I renamed this model DEV1. I made a copy & archive of our UAT model. I changed the mode to standard and it is currently not deployed. I renamed this UAT1. I made a revision tag in DEV1 and when i compare & sync UAT1 with DEV1 it says 
How can i do a compare & sync from DEV1 to UAT1?
Thanks!!
Amanda