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evaluation - How can I interrupt a calculation without aborting it?


Before version 10.0, there was a menu item, Evaluation → Interrupt Evaluation..., which could be used to interrupt a calculation without aborting it. It would bring up this window:


enter image description here


It was possible to enter a subsession, examine the kernel state, then resume the calculation using Return[].


How do I access this functionality in version 10.0 or later?



Answer



The menu item is gone, but the functionality is still there in version 11.0.


It can be accessed by a keyboard shortcut:




  • Command-Option-. on OS X

  • Alt-, on Windows and Linux


The front end token is called



  • "EvaluatorInterrupt"


It can be used e.g through a palette button.


Alternatively, use Evaluation → Evaluate in Subsession for similar functionality. E.g.,


Table[Pause[1]; i, {i, 30}]


Now enter i and evaluate it using the above menu item before the Table has finished running. You will see the current value of i.


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