Re: [ojAlgo-user] bug report: ILP problem

[Anders P. <an...@op...>]

...and please experiment with different values on the various model/solver options - in particular tmpYourModel.options.problem

/Anders


On 8 apr 2013, at 08:58, Anders Peterson <an...@op...> wrote:

> It's better you send me source code that I can execute and use as a test case. /Anders
> 
> On 8 apr 2013, at 01:25, Jeff Sherman <jef...@gm...> wrote:
> 
>> When I execute the following program:
>> Minimize
>> 1*x1
>> Subject To
>> 1*x2013 >= 0
>> 1*x2014 >= 0
>> 1*x1 >= 0
>> -5000.0*x2014 + 5100.0*x2013 + -1.0*x1 <= 0
>> -5000.0*x2014 + 5100.0*x2013 + 1.0*x1 >= 0
>> 5000*x2013 + 5000*x2014 = 19105000
>> Bounds
>> Variables
>> x2014 integer
>> x2013 integer
>> x1 continuous
>> 
>> I get these results which are suboptimal:
>> x1 = 5899.999999996906
>> x2013 =  1891
>> x2014 = 1930
>> 
>> Or these results (which seem to occur at random):
>> x1 = Infinity
>> x2013 =  0
>> x2014 = 0
>> 
>> Using another solver, I obtain: 
>> x1 = 4200.000000000075
>> x2013 = 1892
>> x2014 = 1929
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> 
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