I am running Inventor 2012 sp2.
Even with a simple IPT that only has a handfull of features, at times it takes a long time (3-5 minutes, sometimes longer) for Inventor to execute a undo or redo command.
Undo file size setting in Application options is set at 1MB (which is teh same setting I used in previous versions).
I haven't seen this issue before, but now after a receint upgrade to Invetor 2012 from 2010, I am now seeing an issue there.
the issue hasn't been file specific, I have had this issue occur on a lot of files. Other people I work with have been experiencing the same issue.
Is it really at 1 MB or is that a typo?
We have our undo file size set to 1024 MB so inventor actually has some memory to undo stuff.
Does the speed improve if you increase your setting?
(i believe the default was 256)
ah ok, typo...
Anyway, do you see any difference when you change that size (up or down)?
Could there be anything else interfering, like antivirus or such?
I'm on 2013, never used sp2 for 2012... so can't say if it could be related to that...
Just a thought, but if you go to the Tools tab > Application Options button > File tab and look at the Undo file location option, you might try changing that to a different location (network location vs. local location) to see if that changes anything.
I hope this helps.
Best of luck to you in all of your Inventor pursuits,
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Are you using ctrl+Z and ctrl+Y to undo and re-do, or are you using the menu icons? I have noticed that some commands take longer with the keyboard than with the menu for some reason. I'm not sure what service pack it started with; but it is definatly something I see in 2012.