[SCIP] Error with VRP example

Matthias Miltenberger miltenberger at zib.de
Tue Jun 20 12:11:14 CEST 2017


Dear Waldstein Wang,

to be able to help you with your problem, we need some more information 
about the error you experienced.

How did you build the VRP example? Maybe try compiling both SCIP and the 
example using `make OPT=dbg` and run `make OPT=dbg clean` before.

cheers
Matthias

On 15.06.2017 04:58, Waldstein Wang wrote:
> Dears,
> I build the VRP example successfully. But when I run it, the console 
> reports:
>
> 9801a7b319bb:cmake-build-debug baohuaw$ ./SCIP_VRP ../data/eil7.vrp
> Solving the vehicle routing problem using SCIP.
> Implemented by Andreas Bley.
>
> Number of nodes: 7
> Max demand per tour: 3
>
> SCIP version 4.0.0 [precision: 8 byte] [memory: block] [mode: 
> optimized] [LP solver: SoPlex 3.0.0] [GitHash: a80a247]
> Copyright (C) 2002-2017 Konrad-Zuse-Zentrum fuer Informationstechnik 
> Berlin (ZIB)
>
> LP Solver <SoPlex 3.0.0>: barrier convergence tolerance cannot be set 
> -- tolerance of SCIP and LP solver may differ
> LP Solver <SoPlex 3.0.0>: fastmip setting not available -- SCIP 
> parameter has no effect
> LP Solver <SoPlex 3.0.0>: number of threads settings not available -- 
> SCIP parameter has no effect
> transformed problem has 21 variables (0 bin, 21 int, 0 impl, 0 cont) 
> and 33 constraints
>      33 constraints of type <linear>
>
> original problem has 57 active (8.22511%) nonzeros and 57 (8.22511%) 
> check nonzeros
>
> presolving:
> clique table cleanup detected 0 bound changes
>
> presolved problem has 57 active (8.22511%) nonzeros and 57 (8.22511%) 
> check nonzeros
>
> presolving (1 rounds: 1 fast, 1 medium, 1 exhaustive):
>  0 deleted vars, 0 deleted constraints, 0 added constraints, 0 
> tightened bounds, 0 added holes, 0 changed sides, 0 changed coefficients
>  0 implications, 0 cliques
> presolved problem has 21 variables (0 bin, 21 int, 0 impl, 0 cont) and 
> 33 constraints
>      33 constraints of type <linear>
> Presolving Time: 0.00
>
> Bus error: 10
>
> It seems that something wrong occurs.
> I try to debug it and an exception happens at
> SCIP_CALL(SCIPsolve(scip));
> Would you please help me?
> Thanks.
>
>
> _______________________________________________
> Scip mailing list
> Scip at zib.de
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-- 
\__________________

Matthias Miltenberger
Zuse Institute Berlin
Takustr. 7, 14195 Berlin
www.zib.de/miltenberger
miltenberger at zib.de
+49 (30) 841 85-245

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