Installing gurobi works fine in Sage-5.8 also.  So the problem first 
appeared in Sage-5.9.

On Saturday, May 4, 2013 12:10:42 AM UTC-4, Daniel Friedan wrote:
>
> The gurobi backend does not seem to get built in Sage-5.9 under Mac OS X 
> 10.6.8.  I'm running sage-5.9-OSX-64bit-10.6-x86_64-Darwin-app.  I have 
> gurobi461 (the last version for OS 10.6.8).  It works in Sage-5.7 (after 
> the installation method described below).
>
> I copied from Sage-5.7 to Sage-5.9 the links 
> Contents/Resources/sage/local/{lib/libgurobi.so,include/gurobi_c.h}.  Then, 
> in Contents/Resources/sage/, I ran './sage -b'.  The output contained no 
> mention of gurobi.
>
> When I run Sage-5.9 and attempt to use solver="Gurobi" I get "ImportError: 
> No module named gurobi_backend."  (The corresponding installation of CPLEX 
> works fine in Sage-5.9.)
>
> Daniel Friedan
>
>

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