[SCIP] Using GuRoBi as LP solver: error in compilation using make LPS=grb ZIMPL=false
Matheus Ota
matheusota at gmail.com
Wed Dec 11 14:03:04 CET 2019
Hi Naga,
I'm not from the SCIP team, but in order to check if your LP solver is
Gurobi you may try to look (if you are using SCIP with C++) at the method
SCIPlpiGetSolverName().
Best,
Matheus
Em qua., 11 de dez. de 2019 às 08:08, Naga Venkata Chaitanya Gudapati -
nagavenkata.gudapati at studio.unibo.it <nagavenkata.gudapati at studio.unibo.it>
escreveu:
> Thanks for your suggestions.
>
> I tried the CMAKE route and the GuRoBi directories couldn't be found. I
> have tried the other suggestion to load the softlinks and I think it worked.
>
> but during compilation of the source code, I got numberous warnings:
>
> warning: unknown warning option
> '-Wno-maybe-uninitialized'; did you mean
> '-Wno-uninitialized'? [-Wunknown-warning-option]
>
> But I think that is a clang/LLVM issue and not SCIP issues.
>
> At the end of the compilation,
>
> ** Build complete.
> ** Find your SCIP binary in
> "/Users/cgudapati/scipoptsuite-6.0.2/scip/bin".
> ** Enter "make test" to solve a number of easy instances
> in order to verify that SCIP runs correctly.
>
> But make test is not working and gives me the following error
>
> cd check; \
> bash ./check.sh short
> bin/scip-6.0.2.darwin.x86_64.gnu.opt.spx2.none default
> scip-6.0.2.darwin.x86_64.gnu.opt.spx2.none results 3600 2100000000 6144 1
> default 10000 \
> false false 6.0.2 spx2 none /tmp false
> optimize 0 1 false 0 \
> 0 0;
> ERROR: "bin/scip-6.0.2.darwin.x86_64.gnu.opt.spx2.none"
> not found.
> This is needed by ./check.sh to work. Check your
> $PATH variable or install the tool
> "bin/scip-6.0.2.darwin.x86_64.gnu.opt.spx2.none".
> Skipping test since the binary
> bin/scip-6.0.2.darwin.x86_64.gnu.opt.spx2.none does not exist.
> make[1]: *** [test] Error 2
> make: *** [test] Error 2
>
> It is probably because soplex is not installed.
>
> When I cd into scipoptsuite-6.0.2/scip/bin/ and run
>
> ./scip
>
> I get the folliowing error:
>
> SCIP version 6.0.2 [precision: 8 byte] [memory: block]
> [mode: optimized] [LP solver: Gurobi 8.1.0] [GitHash: e639a0059d]
> Copyright (C) 2002-2019 Konrad-Zuse-Zentrum fuer
> Informationstechnik Berlin (ZIB)
>
> External codes:
> Readline EditLine w GNU library for command line
> editing (gnu.org/s/readline)
> Gurobi 8.1.0 Linear Programming Solver developed
> by Gurobi Optimization (www.gurobi.com)
> CppAD 20180000.0 Algorithmic Differentiation of C++
> algorithms developed by B. Bell (www.coin-or.org/CppAD)
> ZLIB 1.2.11 General purpose compression library
> by J. Gailly and M. Adler (zlib.net)
> GMP 6.1.2 GNU Multiple Precision Arithmetic
> Library developed by T. Granlund (gmplib.org)
>
> user parameter file <scip.set> not found - using default
> parameters
>
> [1] 50704 segmentation fault ./scip
>
> I have decided to stop fiddling with macOS and since I have access to a
> linux server I tried doing the same with make and using the softlinks and
> it seemed to have worked( I only compiled the SCIP part of the suite and
> not soplex).
>
> when I run ./scip in my linux machine,
>
>
> SCIP version 6.0.2 [precision: 8 byte] [memory: block]
> [mode: optimized] [LP solver: Gurobi 8.1.1] [GitHash: e639a0059d]
> Copyright (C) 2002-2019 Konrad-Zuse-Zentrum fuer
> Informationstechnik Berlin (ZIB)
>
> External codes:
> Readline 7.0 GNU library for command line
> editing (gnu.org/s/readline)
> Gurobi 8.1.1 Linear Programming Solver developed
> by Gurobi Optimization (www.gurobi.com)
> CppAD 20180000.0 Algorithmic Differentiation of C++
> algorithms developed by B. Bell (www.coin-or.org/CppAD)
> ZLIB 1.2.8 General purpose compression library
> by J. Gailly and M. Adler (zlib.net)
> GMP 6.1.2 GNU Multiple Precision Arithmetic
> Library developed by T. Granlund (gmplib.org)
>
> user parameter file <scip.set> not found - using default
> parameters
>
> SCIP>
>
> So looks like it is working on the linux machine. I only have a small
> question now. Since I compiled only SCIP on linux without soplex, when I do
> this:
>
> SCIP> read ../instances/adlittle.mps
> SCIP> optimize
>
> everything seems to work and since Gurobi is loaded as the solver, so I
> can be confident that GuROBI was used to solve this? and similarly if I run
> the MIP instances in ug folder, is GuRoBi being used to solve them?
>
> Thanks a lot for your help,
> Nag
>
>
> ________________________________________
> From: Scip <scip-bounces at zib.de> on behalf of Gerald Gamrath <
> gamrath at zib.de>
> Sent: Wednesday, December 11, 2019 3:18 AM
> To: Gregor Hendel; scip at zib.de
> Subject: Re: [SCIP] Using GuRoBi as LP solver: error in compilation using
> make LPS=grb ZIMPL=false
>
> Dear Nag,
>
> on the other hand, if you want to keep using the Makefile, compiling SCIP
> should not be too hard either, you just need to set the correct links.
> When SCIP asks you for the links, it should print some explanation at the
> top of the prompt, which also gives some more details about where your
> links should point to:
>
> * SCIP needs some softlinks to external programs, in particular,
> LP-solvers.
> * Please insert the paths to the corresponding directories/libraries below.
> * The links will be installed in the 'lib/include' and 'lib/static'
> directories.
> * For more information and if you experience problems see the INSTALL file.
>
> -> "grbinc" is the path to the Gurobi "include" directory, e.g.,
> "<Gurobi-path>/include".
> -> "libgurobi.*" is the path to the Gurobi library, e.g.,
> "<Gurobi-path>/lib/libgurobi.so"
>
> Thus, you set the grbinc link correctly, but the
> libgurobi.darwin.x86_64.gnu.so link should point directly to the shared
> library of Gurobi, which should be
> /Library/gurobi810/mac64/lib/libgurobi81.so in your case.
>
> If you want to update the links you can run "make LPS=grb ZIMPL=false
> links", which will ask you for new targets.
>
> Best,
> Gerald
>
> Am 11.12.19 um 08:52 schrieb Gregor Hendel:
> Hi Nag,
>
> welcome to the SCIP mailing list. I recommend you switch to CMake to
> compile SCIP, if available, which is much easier, especially on non-Linux
> platforms. Please refer to
>
> https://scip.zib.de/doc-6.0.2/html/CMAKE.php
>
> In your case, the cmake command should be
>
> cmake .. -DGUROBI_DIR=/Library/gurobi810/mac64/ -DLPS=grb
>
> Happy branch-and-pricing,
> Gregor
>
>
>
> Am 11.12.19 um 06:33 schrieb Naga Venkata Chaitanya Gudapati -
> nagavenkata.gudapati at studio.unibo.it<mailto:
> nagavenkata.gudapati at studio.unibo.it>:
> Hello Everyone,
>
>
> I had never used SCIP before and I am hoping to use it for branch and
> price. I had never used CPLEX before and I am mostly familiar with GuROBi
> (I currently have my "column generation" Framework in GuRoBi) but I am
> facing lot of issues in trying to compile SCIP using GuRoBi as an LP solver.
>
> I compile using
>
> make LPS=grb ZIMPL=false
>
> I am facing issues at these following areas:
>
> > Enter soft-link target file or directory for "lib/include/grbinc"
> (return if not needed):
>
> I am not 100% sure where this directory is. I am currently using this
> directory for the include
>
> /Library/gurobi810/mac64/include
>
> and then for the library
>
> > Enter soft-link target file or directory for "lib/shared/
> libgurobi.darwin.x86_64.gnu.so" (return if not needed):
>
> and I am using this directory
>
> /Library/gurobi810/mac64/lib
>
>
> I think the paths are wrong as it is failing to compile.
>
> This is the error I am getting:
>
> ld: can't map file, errno=22 file
> '/Users/cgudapati/scipoptsuite-6.0.2/scip/lib/shared/
> libgurobi.darwin.x86_64.gnu.so'
>
> clang: error:
> linker command failed with exit code 1 (use -v to see invocation)
>
> build failed with READLINE=true: if readline is not available, try
> building with READLINE=false
>
> build failed with ZLIB=true: if ZLIB is not available, try building with
> ZLIB=false
>
> build failed with GMP=true: if GMP is not available, try building with
> GMP=false (note that this will deactivate Zimpl support)
>
> make[3]: *** [bin/scip-6.0.2.darwin.x86_64.gnu.opt.grb.none] Error 1
>
> make[2]: *** [all] Error 2
>
> make[1]: *** [scipbinary] Error 2
>
> make: *** [scipbinary] Error 2
>
>
>
> I understand the error and SCIP is telling me that it cannot find the .so
> library and neither can I. I realize that GuRoBi support is still in Beta
> but any help is appreciated.
>
>
> Thanks,
>
> Nag
>
>
>
>
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