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CAD tip CAD tip # 3506:

Question CAD 
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Q - question

Can I restore a drawing from an .ac$ file?

A - answer Files with the ac$ extension are AutoCAD temporary files (pointers, undo data, etc.) which are deleted when session ends normally. They do not contain data which can be reconstructed to a .DWG drawing file content.
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See also:
Tip 9428:Save DWG drawing automatically after every N commands.
Tip 8778:How not lose edited DWG drawing even when closed without saving.
Tip 4684:AutoCAD forgets its AutoSave (savetime) settings.
Tip 4345:What is the difference between .BAK, .SV$ and .AC$ backup files?
Tip 1813:Where to find my autosaved drawings?

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