I have AutoCAD 2009 installed but have Design Review 2010. (The only thing I can think of is when I loaded the ACAD 2010 30-day trial that it overwrote my DR 2009.)
When I export to a DWF file in 2009, choose not to view it in DR 2010, when prompted at creation, then try to attach the file as a DWF underlay I get a "You have selected an invalid or unsupported file type" error message. I don't have the option in to save to an older file type.
Can anyone explain what I am doing wrong? Does DR go backwards? Shouldn't ACAD export to a file format compatable to the one being created from? Is it corrupted and I need to reinstall with DR2011 since that is all I can find on the AutoDesk website?
Also, I have no markup capabilities in DR 2010, the menus are grayed out; only the Measure menu is active.