[Scip] Using SCIP included in another source code to solve quadratic constraints

[Jiehua Chen]

Hi,

I encounter the following error message when trying to compile:

compiling obj/O.linux.x86_64.gnu.opt/lib/lpi/lpi_spx.o
src/lpi/lpi_spx.cpp:76:23: fatal error: spxsolver.h: No such file or 
directory
  #include "spxsolver.h"

Can you give me more hints?

Best
Jiehua


On 04/08/2015 03:09 PM, Stefan Vigerske wrote:
> Hi,
>
> it also takes long for me if I disable the subnlp primal heuristic. This
> primal heuristic is also off if you build SCIP without Ipopt. If that is
> the case for you, then you might want to consider rebuiling SCIP with
> Ipopt (see documentation on hints how to do this).
>
> Best,
> Stefan
>
> On 04/08/2015 02:49 PM, Jiehua Chen wrote:
>> Dear all,
>>
>> I have a quadratic constraint problem which I try to solve by using SCIP
>> (as a library) in C++. However, my program does not terminate after 1
>> hour. Curiously, if I use your online solver
>>
>>   http://www.neos-server.org/neos/solvers/go:scip/CPLEX.html
>>
>> , then after several seconds I got the solution. Can you please help me?
>> Thanks!
>>
>> Below is the problem:
>>
>> -------------------------------------------------------------------
>> minimize y#1
>>
>>
>> subject to
>> a#1 = 0
>> a#2 = 0
>>
>> [a#1^2 + a#2^2 - 2 a#1*v#11 - 2 a#2*v#12 - b#1^2 - b#2^2 + 2 b#1*v#11 +
>> 2 b#2*v#12] + y#1 <= 0
>> [b#1^2 + b#2^2 - 2 b#1*v#11 - 2 b#2*v#12 - c#1^2 - c#2^2 + 2 c#1*v#11 +
>> 2 c#2*v#12] + y#1 <= 0
>> [c#1^2 + c#2^2 - 2 c#1*v#11 - 2 c#2*v#12 - d#1^2 - d#2^2 + 2 d#1*v#11 +
>> 2 d#2*v#12] + y#1 <= 0
>>
>> [b#1^2 + b#2^2 - 2 b#1*v#21 - 2 b#2*v#22 - c#1^2 - c#2^2 + 2 c#1*v#21 +
>> 2 c#2*v#22] + y#1 <= 0
>> [c#1^2 + c#2^2 - 2 c#1*v#21 - 2 c#2*v#22 - d#1^2 - d#2^2 + 2 d#1*v#21 +
>> 2 d#2*v#22] + y#1 <= 0
>> [d#1^2 + d#2^2 - 2 d#1*v#21 - 2 d#2*v#22 - a#1^2 - a#2^2 + 2 a#1*v#21 +
>> 2 a#2*v#22] + y#1 <= 0
>>
>> [c#1^2 + c#2^2 - 2 c#1*v#31 - 2 c#2*v#32 - d#1^2 - d#2^2 + 2 d#1*v#31 +
>> 2 d#2*v#32] + y#1 <= 0
>> [d#1^2 + d#2^2 - 2 d#1*v#31 - 2 d#2*v#32 - a#1^2 - a#2^2 + 2 a#1*v#31 +
>> 2 a#2*v#32] + y#1 <= 0
>> [a#1^2 + a#2^2 - 2 a#1*v#31 - 2 a#2*v#32 - b#1^2 - b#2^2 + 2 b#1*v#31 +
>> 2 b#2*v#32] + y#1 <= 0
>>
>> y#1 >= 0.01
>>
>> end
>> -------------------------------------------------------------------
>>
>>
>> Best regards!
>> Jiehua Chen
>> _______________________________________________
>> Scip mailing list
>> Scip at zib.de
>> http://listserv.zib.de/mailman/listinfo/scip
>>
>
>