The server which had the problem was running 4.3.
On the same machine I started another server using 4.3.1.alpha1 and
there was no problem. That was with my usual user account, not the
sage account.
>From the sage account, I copied my 4.3.1.alpha1 build from my own user
account, but I could not get it to work properly.
So now I'm feeling really stupid since I don't seem to be able to try
what you suggested. I could rebuild 4.3.1.alpha1 from scratch in the
sage account but that would take several hours, by which time I would
have gone home from where I cannot connect to this machine on port
8000. But I will do that before going home and can continue looking
at this tomorrow.
John
2010/1/12 William Stein <wst...@gmail.com>:
> On Tue, Jan 12, 2010 at 4:05 AM, John Cremona <john.crem...@gmail.com> wrote:
>> I'm running a server under user "sage" using a pool of users sage0,
>> sage1 etc to run the worksheets. Sage 4.3 on 64-bit ubuntu. All
>> works fine with normal Sage cells, but I get this error when I put
>> %magma at the top of a new cell in a new worksheet:
>>
>> Cell contents:
>>
>> %magma
>> 2+2;
>>
>>
>> Output:
>>
>> Traceback (most recent call last):
>> File "<stdin>", line 1, in <module>
>> File "_sage_input_3.py", line 4, in <module>
>> print _support_.syseval(magma,
>> ur\u0027\u0027\u00272+2;\u0027\u0027\u0027,
>> \u0027/home/sage/.sage/sage_notebook.sagenb/home/cremona/9/cells/1\u0027)
>> File "", line 1, in <module>
>>
>> File
>> "/usr/local/sage/sage-4.3/local/lib/python2.6/site-packages/sagenb-0.4.8-py2.6.egg/sagenb/misc/support.py",
>> line 464, in syseval
>> system.chdir(dir)
>
> I bet this is caused by changes in the notebook. Could you try
> editing the file:
>
> /usr/local/sage/sage-4.3/local/lib/python2.6/site-packages/sagenb-0.4.8-py2.6.egg/sagenb/misc/support.py
>
> and replacing line 464 (the "system.chdir(dir)") by
>
> try: system.chdir(dir)
> except: pass
>
> or -- simply delete the "system.chdir" line.
>
> and see what happens. Please report back. That will likely work,
> in which case we'll do something like that in the notebook, though
> better will be to correctly define dir (it is wrong right now).
> Please report back.
>
>> File
>> "/usr/local/sage/sage-4.3/local/lib/python2.6/site-packages/sage/interfaces/magma.py",
>> line 905, in chdir
>> magma.eval('ChangeDirectory("%s")'%dir)
>> File
>> "/usr/local/sage/sage-4.3/local/lib/python2.6/site-packages/sage/interfaces/magma.py",
>> line 520, in eval
>> raise RuntimeError, "Error evaluating Magma code.\nIN:%s\nOUT:%s"%(x, ans)
>> RuntimeError: Error evaluating Magma code.
>> IN:ChangeDirectory("/home/sage/.sage/sage_notebook.sagenb/home/cremona/9/cells/1");
>> OUT:
>>>> ChangeDirectory("/home/sage/.sage/sage_notebook.sagenb/home/cremona/9/cells
>> ^
>> Runtime error in 'ChangeDirectory': Cannot change directory to
>> "/home/sage/.sage/sage_notebook.sagenb/home/cremona/9/cells/1"
>> (Permission denied)
>>
>> Note that there is no error if I delete the first line ("%magma").
>>
>> I noticed that some relevant files have the following permissions:
>>
>> s...@selmer:~/.sage/sage_notebook.sagenb/home/cremona/9$ ls -al
>> /home/sage/.sage/sage_notebook.sagenb/home/cremona/9
>> total 24
>> drwxr-xr-x 4 sage sage 4096 Jan 12 12:01 .
>> drwxr-xr-x 12 sage sage 4096 Jan 12 11:57 ..
>> drwxr-xr-x 3 sage sage 4096 Jan 12 11:58 cells
>> drwxrwxrwx 2 sage sage 4096 Jan 12 11:57 data
>> -rw-r--r-- 1 sage sage 1280 Jan 12 12:01 worksheet.html
>> -rw-r--r-- 1 sage sage 381 Jan 12 12:01 worksheet_conf.pickle
>>
>> s...@selmer:~/.sage/sage_notebook.sagenb/home/cremona/9$ ls -al
>> /home/sage/.sage/sage_notebook.sagenb/home/cremona/9/cells
>> total 12
>> drwxr-xr-x 3 sage sage 4096 Jan 12 11:58 .
>> drwxr-xr-x 4 sage sage 4096 Jan 12 12:01 ..
>> drwx------ 2 sage sage 4096 Jan 12 11:58 1
>>
>> s...@selmer:~/.sage/sage_notebook.sagenb/home/cremona/9$ ls -al
>> /home/sage/.sage/sage_notebook.sagenb/home/cremona/9/cells/1
>> total 8
>> drwx------ 2 sage sage 4096 Jan 12 11:58 .
>> drwxr-xr-x 3 sage sage 4096 Jan 12 11:58 ..
>>
>> If the issue were that the worksheet is running under user sage0 while
>> the files are all owned by the notebook process sage, which I don't
>> believe is true, then the "%magma" would make no difference.
>>
>> This problem did not arise when I did not use the pool. And the
>> machine does have magma installed!
>>
>> Any ideas?
>>
>> John
>>
>> --
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>> URL: http://www.sagemath.org
>>
>>
>
>
>
> --
> William Stein
> Associate Professor of Mathematics
> University of Washington
> http://wstein.org
>
> --
> To post to this group, send an email to sage-devel@googlegroups.com
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>
>
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