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Tip and Trick Detail
Limiting the number of Regens with RegenAuto
*Applies to: AutoCAD R12, 13, 14, 2000, 2000i, 2002, 2004 and 2005*

RegenAuto is one of those commands that just doesn't seem all that important when you first think about it, but it plays a large roll when you are working on a large drawing or creating a script file.  Normally you wouldn't think to turn off the automatic process Regenning the drawing, but there are advantages to this at times to make the drawing process go much quicker.  If you have created a script file to do some automated tasks it is to your advantage to turn off RegenAuto before the script file runs and then just perform on Regen right at the end of the script file.  This can save seconds to minutes based on the size of the drawing that you might be working with.  Of course there is a downside to turning off the RegenAuto for an extended period of time.  AutoCAD will begin to prompt you that the Regen was queued and ask whether or not it should be performed, so you may need to experiment a little bit with this command and setting before you get a good feel of when to use it or when not to use it.

Related System Variable: REGENMODE

0 (OFF) -  Suppresses automatic Regens and will prompt when necessary

1 (ON) -  Regens take place automatically through out the drawing.

Command Line:
Command: regenauto
Enter mode [ON/OFF] <ON>: off