First, the bad news: There are two ways you can ensure After Effects CS4 will crash on exit:

1) Boot AE CS4 with an add-on script open in a docked panel.

2) Quit AE CS4 with an add-on script open in a docked panel.

Now, the good news: It’s a relatively benevolent crash; you won’t lose data or take down any other programs as well. Also, it’s fairly easy to work around this bug: Either open your scripts that have user interfaces in undocked (floating) panels, or make sure all scripts (such as Ease and Wizz, or TrackerViz) are closed when you quit – perhaps create a Workspace that has them all closed, and select that before quitting.

Yes, Adobe is well aware of the problem. No, it is not fixed in the AE 9.0.1 update. But at least now you know what’s going on, should you be suffering persistent and mysterious crashes on exit…

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