I have seen the option before when exporting out a .NWC file where you have the choice of either a 2011 .NWC or a 2012 .NWC from autocad MEP 2012. I have both exporters loaded however I do not recieve the option to choose which exporter I want to use. Does anyone know how to set this up?
I found out my own answer. Unload both .ARX files then when exporting out if asks you which version you would like to use.