[R-SIG-Mac] Lost Library ?

Rainer M Krug Rainer at krugs.de
Wed Sep 7 09:13:41 CEST 2016

Roger Koenker <rkoenker at illinois.edu> writes:

> This is a question about how to find a lost library needed for the gurobi R package.
> Gurobi is a optimization system with various frontends including to R.
> Even though I realize that few of you use, or may even know about, gurobi I hope
> that there may be  some generic advice — my first  dubious attempts, contrary to Simon’s
> periodic advice that use of DYLD_LIBRARY_PATH is frowned upon,  have proven futile.
> Here is the basic story:
> I've installed gurobi and its license file and this seems to work on a test problem from the command line,
> but I would like to use the R package interface and have installed the R binary package that comes with
> the gurobi download on a R 3.3.0 system on an osx 10.11.5 machine,   As far as I can see there is no
> source version of the R package available.   The package “seems to” install, but I now see in R:
>> library(gurobi)
> Loading required package: gurobi
> Loading required package: slam
> Error in dyn.load(file, DLLpath = DLLpath, ...) : 
>   unable to load shared object '/Library/Frameworks/R.framework/Versions/3.3/Resources/library/gurobi/libs/gurobi.so':
>   dlopen(/Library/Frameworks/R.framework/Versions/3.3/Resources/library/gurobi/libs/gurobi.so, 6): Library not loaded: libgurobi65.so
>   Referenced from: /Library/Frameworks/R.framework/Versions/3.3/Resources/library/gurobi/libs/gurobi.so
>   Reason: image not found
> the library libgurobi65.so is sitting in /usr/local/lib so I don't understand why the
> R process can't find it -- this is what the R package library thinks:

This indicates, that you installed gurobi using homebrew?

How did you install the R package? Did you install it as a binary? If
yes, then install it type="source" so that it is compiled with the
correct library paths.

If both assumptions are wrong: how did you install R, gurobi and the R



> yzzy: otool -L g*
> gurobi.so:
> 	gurobi.so (compatibility version 0.0.0, current version 0.0.0)
> 	libgurobi65.so (compatibility version 6.5.0, current version 6.5.2)
> 	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1197.1.1)
> 	/Library/Frameworks/R.framework/Versions/3.2/Resources/lib/libR.dylib (compatibility version 3.2.0, current version 3.2.2)
> 	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 855.17.0)
> Many thanks for your help,
> Roger
> url:    www.econ.uiuc.edu/~roger            Roger Koenker
> email    rkoenker at uiuc.edu            Department of Economics
> vox:     217-333-4558                University of Illinois
> fax:       217-244-6678                Urbana, IL 61801
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Rainer M. Krug
email: Rainer<at>krugs<dot>de
PGP: 0x0F52F982
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