A couple of times I've given a command which causes a freeze - maybe my syntax is at fault...
But anyway, instead of a command being executed and the command number being given, the prompt at the left of the cell sits at [*] and nothing happens. Back in the console, from which I started the Jupyter notebook, there are these messages: [Heartbeat] thread started ... [Shell] loop started [Recv]: issue with UTF-8 decoding [W 17:09:07.678 NotebookApp] Timeout waiting for kernel_info reply from f3a09763-cd3e-47d1-bead-c27fd9879ccb [W 17:09:07.795 NotebookApp] 404 GET /static/components/codemirror/mode/spad/spad.js?v=20151011110219 (127.0.0.1) 13.37ms referer= http://localhost:8888/notebooks/Untitled5.ipynb?kernel_name=ispad What's the best option here? Restarting the kernel from the notebook doesn't seem to do much, in fact I get this error message in the console: >> System error: C error EADDRINUSE: Address already in use. which I understand to be a problem of an improper shut-down. I can't restart the kernel... I have to stop and clear everything, and restart from scratch. So my question is: is there any way of aborting a frozen computation, or one which is simply taking too long, and get back to working with the notebook without losing anything? In the Sage notebook, pressing the Escape key a few times usually does the job, so I was hoping something similar would work here. Maybe Esc is not sending the correct message to the kernel? Many thanks, Alasdair -- [image: http://www.facebook.com/alasdair.mcandrew] <http://www.facebook.com/alasdair.mcandrew> [image: https://plus.google.com/+AlasdairMcAndrew/posts] <https://plus.google.com/+AlasdairMcAndrew/posts> [image: https://www.linkedin.com/pub/alasdair-mcandrew/a/178/108] <https://www.linkedin.com/pub/alasdair-mcandrew/a/178/108> [image: https://twitter.com/amca01] <https://twitter.com/amca01> [image: http://numbersandshapes.net] <http://numbersandshapes.net> -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. To unsubscribe from this group and stop receiving emails from it, send an email to fricas-devel+unsubscr...@googlegroups.com. To post to this group, send email to fricas-devel@googlegroups.com. Visit this group at http://groups.google.com/group/fricas-devel. For more options, visit https://groups.google.com/d/optout.
