I was about to post asking if anyone knows of this error in Maya and knows of a fix, but instead I 'Googled' it.
If ever you get this error, simply do the following;
Windows - Settings & Preferences > Preferences.
The find the 'Undo' tab on the left hand side, there you can find the On and Off settings.
(Tip: You can also set how big the queue can get, I think some how, it's useful to set it to unlimited, but be wary of your memory usage and file sizes. :) )
-Dan.
EDIT:
Apparently Maya randomly decides to shut down the "Undo" script if memory gets to scarce or something, another quick fix is to go into the mel window, and type; flushUndo; and place that shortcut onto your Shelf.
If ever you get this error, simply do the following;
Windows - Settings & Preferences > Preferences.
The find the 'Undo' tab on the left hand side, there you can find the On and Off settings.
(Tip: You can also set how big the queue can get, I think some how, it's useful to set it to unlimited, but be wary of your memory usage and file sizes. :) )
-Dan.
EDIT:
Apparently Maya randomly decides to shut down the "Undo" script if memory gets to scarce or something, another quick fix is to go into the mel window, and type; flushUndo; and place that shortcut onto your Shelf.
If undo's don't work it generally means you have the Caps Lock turned on on you keyboard.
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