Hello Daniele,
the model you appended is not solvable because:
- Manual work is required for the following activities
set H := 3 4 5 6 7 8 25;
- The manual actvity is disallowed in time slots 1 to 720 (set TC).
- Activity 3 has to end latest in time slot 321 (param LST[3]).
Please, check your data file.
If you remove the following constraints the model is solvable
#subject to VincStraordinari1{i in H, t in TC}: x[i,t]=0 ; /* vincolo
sulle attività a configurazione manuale */
#subject to VincStraordinari2{i in H, t in TC: (t+ d[i]) in TC}:
x[i,t]=0 ; /* vincolo sulle attività a configurazione manuale */
$ glpsol -m File25attivita?MOD.mod -d File25attivita?DAT.dat
+ 2718: mip = 9.000000000e+03 >= tree is empty 0.0% (0; 91)
INTEGER OPTIMAL SOLUTION FOUND
Time used: 131.9 secs
Memory used: 880.4 Mb (923145628 bytes)
Best regards
Xypron
On 21.07.2012 15:35, Daniele Micarelli wrote:
> Hello
> I have these two files that i attached
>
> because when i fix these two files with GLPSOL, it used too long (even
> days) using the commands - math - cuts, and I wanted to know if there
> are ways of presolving to speed the resolution
>
> thank you very mutch
>
> Best
>
> Daniele
>
>
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