The new blend

 From:  Michael Gibson
6085.7 
Hi Burr, also let me know if you see "Calculation failed" pop up when it doesn't seem like it should.

It's implemented in a generic way where it kicks in for any command if it does not produce any geometry output, and maybe some particular command might trigger it inadvertently if it happens to do something that looks the same as a failed calculation while it is in its initialization step.

It could be possible that some command may need a little bit of tuning to deal with it.

- Michael