DRAW freezing...sort of....unable to save

With CDX7 I have had the program go to some sort of strange state where it still works but I am unable to save. The "Save/Save as" commands are greyed out. I can open another document, copy over my work and save it....but not the original. The program will not close and Task Manager says CD has stopped working. My document this time was a single page with several power clip objects but this has happened in other situations. Comments or suggestions?