In Civil 3D 2013 I'm attempting to import styles from another drawing. Whenever I select the Import button under Manage > Styles I get a warning box pop up that says "The drawing has unsaved modifications. Please save the drawings and then perform the style import again".
This occurs even after I hit save or reopen the drawing. Is there a fix for this issue?
Perhaps you have a lisp routine running that does something to your file immediately after an open or save. I know I used to have on that would modify the drawing when saved and that would probably prevent this command from running (I don't use it anymore thanks to unreconciled layers).
I had the same problem, is your default file save format set to other than Autocad 2010?
Mine was set to 2007 and I think that was the problem, it must run a script to make it compatible after saving which screws up the Import Settings tool.
Try changing that and see if it works.