Dynamic freeze
- To: mathgroup at smc.vnet.net
- Subject: [mg101680] Dynamic freeze
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Tue, 14 Jul 2009 05:35:33 -0400 (EDT)
From time to time when opening a notebook containing dynamic content (e.g. a Mathematica demonstration) Mathematica appears to freeze, and then the following message appears: One or more dynamic objects are taking excessively long to finish evaluating. You may either disable further dynamic evaluations or continue waiting. Dynamic updating can be re-enabled using the Dynamic Updating Enabled command in the Evaluation menu. All very well, except that my experience has taught me that this situation is (almost?) always equivalent (from the user point of view anyway) to a Front End Crash. Clicking the "Continue" button seems to guarantee that the same dialog will return after a further period of apparent freeze. Clicking on "Disable Dynamic Updating" is usually impossible and in fact I am not sure if I have ever succeeded in getting out of this sort of situation without having to Force Quit Mathematica. What's more worrying is that this sort of thing happens with perfectly good notebooks containing no errors of any kind, including demonstrations downloaded from the Demonstrations site. It only happens from time to time, fortunately not very often, but I have not been able to discover any reproducible way to arrive at this situation. It looks like it depends on the internal state of Mathematica rather than on the contents of the notebook. I am experiencing this now with version 7.01 under Mac OS X, 10.5.7, but I think the same thing used to happen in every version since version 6 and Mac OS X. Andrzej Kozlowski