AutoCAD Performance Issues and Crashes

Here are some items that cause AutoCAD Performance Issues and Crashes, as well as how to fix them:

Performance Issues:

Cause
Solution
Drawing has too many viewports (Should be about 8 or less) Reduce the number of viewports in the drawing by moving backgrounds to allow for a single viewport to show multiple unit plans for example. You may also try setting the MAXACTVP variable to a low number, such as 4.
Too many xRefs in a single drawing Only keep what is shown on the sheets in the drawing
Drawing starts too far away from 0,0 The bottom left of your drawing should always start at 0,0 (Except Civil drawings, they should be drawn to Civil standards)
Construction Lines/Rays are used Avoid using construction lines and rays, instead use the line command on the a non plotting layer, such as Defpoints
There are too many pieces of text that use TTF fonts Use SHX fonts whenever possible and reduce the amount of individual pieces of text by using multiline text where possible.
Drawing contains too many objects If something is no longer needed, delete it.
Use the overkill command to remove overlapping lines
Use the UPU command to purge the drawing
Drawing is not in World UCS or is in a 3D view Reset to world UCS and enter plan view
  • Drawing was originally created in something other than AutoCAD
  • Drawing contains AEC objects
  • Drawing is still slow or crashes a lot
 Do the following:
  1. Use Overkill to remove overlapping lines
  2. Purge the drawing with the UPU command
  3. Use the Audit command and say yes to having it fix errors
  4. Use -EXPORTTOAUTOCAD
  5. Open the new file
  6. Use Overkill again
  7. Purge the drawing with the UPU command
  8. Use Audit command and say yes to having it fix errors
  9. Copy and paste everything into yet another new drawing, using a basepoint of 0,0
  10. Repeat these steps for each and every x-Ref
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