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Re: Mathematica Kernel Stops Functioning

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  • Subject: [mg131450] Re: Mathematica Kernel Stops Functioning
  • From: "Thomas P. Melehan" <tpmelehan at gmail.com>
  • Date: Wed, 24 Jul 2013 22:04:47 -0400 (EDT)
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Please share the results of your discussions with Wolfram - I have experienced much the same problem..

Thanks

Tom
On Jul 23, 2013, at 5:21 PM, johnfeth at gmail.com wrote:

> On Sunday, July 21, 2013 1:13:55 AM UTC-7, David Bailey wrote:
>> On 18/07/2013 07:46, johnfeth at gmail.com wrote:
>>
>>> I installed Mathematica 9 on my computer (64 bit quad core AM 3450 (AMD) processor with 6 GB of ram) about a week ago.  I've run a couple of notebooks (a notebook with intensive numerical computation and a notebook with intensive symbolic computation) which I developed on Mathematica versions 6, 7, and 8.  Both of these notebooks work very well with Mathematica 6, 7, and 8.
>>
>>>
>>
>>> However, Mathematica 9 starts off with great fervor (as I watch with the Windows 7 (64 bit) Resource Monitor), but after about an hour of computation, the Mathematica kernel simply stops working and the CPU runs at only about 1% apparently performing only inscrutable PC housekeeping tasks.  Not surprisingly, the notebook never ends, and I get no result.
>>
>>>
>>
>>> Does anyone have an idea why this is happening?  Or better yet, how to fix it?
>>
>>>
>>
>>> Thanks,
>>
>>>
>>
>>> John
>>
>>>
>>
>> You are going to have to supply more evidence, or narrow the issue down
>>
>> somewhat.
>>
>>
>>
>> Installing Mathematica 9 will not remove previous versions, so I would
>>
>> try running your problems on a previous version just to confirm that
>>
>> they do still work.
>>
>>
>>
>> Obviously, if the notebook is reasonably self contained, it may be best
>>
>> to just send it to Wolfram Support, but I'd start by watching to
>>
>> determine which cell of your notebook actually hangs.
>>
>>
>>
>> It may also help to add a few Print statements at likely places to
>>
>> follow the progress of your calculation.
>>
>>
>>
>> If the notebook is small and self-contained enough, you could put it
>>
>> somewhere on the internet and post a link here.
>>
>>
>>
>> David Bailey
>>
>> http://www.dbaileyconsultancy.co.uk
>
> David,
>
> Thanks for your reply.  I've made a notebook with the algorithm and a data set, the analysis program I've written, and the results using
>
> Mathematica 8 which plots 43 data points(3100 seconds to completion with Ubuntu Linux, 32 bit 2.4 GHz Intel quad core processor)
>
> and using
>
> Mathematica 9 plotting only 7 data points(8000 seconds to completion with with Windows 7, 64 bit 3.6 GHz AMD quad core processor).
>
> I've sent the notebook to Mathematica support and they are trying to understand the gross performance difference.
>
> In the mean time, if you would like to fiddle around with it, I could send you the notebook (~1.1 M bytes, virtually all of which is a data set). 
>
> John Feth
>




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