Re: [Help-glpk] Status : Integer Undefined : what does it mean.

[rainly]

Hi,

I have exactly the same problem. I am using API and I do not set any time
limit. If I add a break point after     glp_simplex(lp, NULL); I can see
OPTIMAL SOLUTION FOUND in the command line window. However, the output file
shows "Status: INTEGER UNDEFINED" and everything takes 0. What should I do?

Thanks a lot.

Andrew Makhorin wrote:
> 
>> I am trying to solve a problem with GLPK 4. 36.  As I run it with
>> GPLSol with timeout of 900 seconds, it prints out the line "OPTIMAL
>> SOLUTION FOUND" after some time in the log file and then "Integer
>> Optimization Begins"
> 
> The message "OPTIMAL SOLUTION FOUND" means that the solver found an
> optimal solution to LP relaxation, not to MIP.
> 
>> After time out when the output file is generated. It shows 
>> "Status: INTEGER UNDEFINED"
> 
>> What is the meaning of this ?
> 
> This means that the solver did not find any integer feasible solution
> for 900 secs.
> 
>>  Should I consider that it is able to solve my prolbem ?
> 
> Try to increase the time limit.
> 
> 
> 
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