I'm using 'SageMath Version 6.7, Release Date: 2015-05-17' on Ubuntu 14.04. 
I think this is the latest version. 

On Monday, July 13, 2015 at 1:32:12 PM UTC-4, Volker Braun wrote:
>
> Works for me. You need a sufficiently new Sage version (which version do 
> you use?)
>
> On Monday, July 13, 2015 at 6:49:26 PM UTC+2, Jeremy Owen wrote:
>>
>> Hello,
>>
>> I'm interested in using Sage to perform modular decomposition of graphs. 
>> I gather this functionality used to be built into Sage but had a bug (
>> http://trac.sagemath.org/ticket/13744) and was later moved to a spkg (
>> http://trac.sagemath.org/ticket/17950) called modular_decomposition 
>> (with the bug fixed?). Please correct me if I am wrong---I may be 
>> misunderstanding the discussion on those tickets.
>>
>> I tried to download the spkg with sage -i modular_decomposition but I 
>> get: 
>>
>> [Errno 404] Not Found: '//mirrors.mit.edu/sage//spkg/archive/list'
>> sed: can't read /home/jeremy/.sage//archive.list: No such file or 
>> directory
>> Error: could not find a package matching modular_decomposition on 
>> http://mirrors.mit.edu/sage//spkg
>>
>> I have also tried downloading the .tar.bz2 listed on the second ticket, 
>> placing it in SAGE_ROOT/upstream, then running "sage -i 
>> modular_decomposition" but I get the same error message.
>>
>> Many thanks,
>> Jeremy
>>
>>

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