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## Re: [Help-glpk] Problem Has no Primal Feasible Solution

**From**: |
glpk xypron |

**Subject**: |
Re: [Help-glpk] Problem Has no Primal Feasible Solution |

**Date**: |
Sat, 07 Jul 2012 06:09:21 +0200 |

Hello Daniele,
take a look at this constraint:
/* temporal precedence constraint */
subject to PrecTemp{i in A,j in A}: sum{t in T} tt[t]*x[j,t] >= sum{t in T}
tt[t]*x[i,t] + d[i];
For i = j it requires non-positive durations 0 >= d[i].
Best regards
Xypron
-------- Original-Nachricht --------
>* Datum: Fri, 6 Jul 2012 12:25:58 +0200*
>* Von: Daniele Micarelli <address@hidden>*
>* An: address@hidden*
>* Betreff: [Help-glpk] Problem Has no Primal Feasible Solution*
>* Hi,*
>* i'm attaching the two file .mod and .dat to let you know*
>* *
>* When i run these files with glpsol, i get these two messages at the end:*
>* *
>* *Model has been successfully generated*
>* and*
>* PROBLEM HAS NO PRIMAL FEASIBLE SOLUTION*
>* *
>* *in my opinion should exist one solution*
>* *
>* it's possible?*