Wow, you can't upgrade the NWF file from 2011 to 2012 and then export a new 2012 NWC or you get an error upon opening the file. The workaround I'm told is to still export 2011 NWCs. Well it just so happens that you cannot export a 2011 NWC out of a 2012 Revit file. And you can't save down either a Revit file or a NWC file. So, we're stuck recreating the entire NWF with ALL nearly 100 batches of clashes and running through and sorting through them all again?!?
Has anyone went through this process? Does it even import the batches file selections and maintain the collisions by object IDs? Or is it a complete set back to square one?