Did you know that Autodesk released two great, free applications to view and plot DWG files as well as to Convert DWGs from version to version ! Formats available from R14 to 2007.
DWG TrueView and DWG TrueConvert
* There is a bug when using cut and paste after using TrueConvert and here is the fix. TrueConvert Fix (copy a new acdb17.dll file over)
* Also, at the bottom of that same hotfix page is a utility to find effected files that have been converted.
TrueView Zooming issue:
When you were zooming out in DWG TrueView, you reached a point where you could not zoom out any farther. In the status bar, you saw the following message:
Already zoomed out as far as possible.
To zoom out farther, switch between the Layout and Model tabs once to force a regeneration of the drawing.