Hi Maxim

Many of my drawings are based on site surveys etc. sourced from others, and are often composites from several sources. I am a landscape architect and projects always involve modification of sites, not building new ones scratch, so the drawing process mirrors that principle.

Most of the source drawings have probably been prepared in Windows systems (I assume). In general I copy info from those files into new drawing files created from templates on my Mac, rather than simply copying the original file and editing/adding to that.

(BTW, I have found that it is necessary to reset SCALELISTEDIT to clear out multiple scale settings that are brought into files this way, and which can significantly increase file sizes.)

The crashing is only obvious on larger files that have involved more cutting and pasting from other sources, rather than small new files - but I can't tell whether that is because the new small ones are actually more stable, or because I spend almost all of my drawing time on more time on the larger, more complex files.

The problem only began to occur after upgrading to OS X (and began almost immediately after upgrading). Autocad was always very stable on my Mac before that.

Ron