Hi
Why I can not get the solution in my code which is attached?
solution is 'NonType object'
Thanks

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Pedram Jazayeri
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#DecisionOptimization

Dear Pedram,

It is likely because the solver doesn't find a solution to your problem
you should be able to check the solve status and invoke the conflict refiner to display conflicting constraints with:

import docplex.mp.conflict_refiner as cr
m.solve()
solve_status = m.get_solve_status()
print(solve_status)
if solve_status.name in [ 'INFEASIBLE_SOLUTION', 'INFEASIBLE_OR_UNBOUNDED_SOLUTION']:
         cref = cr.ConflictRefiner()
    print('show minimal conflict')
    cref.refine_conflict(m, display=True)

I hope this helps,

  Cheers,

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Renaud Dumeur
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Hi dear Renaud
I found that the problem has infeasible solution, but how I can recognize which of the constraints and upper bound are the conflict?
Thanks

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Pedram Jazayeri
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Original Message:
Sent: Wed August 03, 2022 03:50 AM
From: Renaud Dumeur
Subject: docplex

Dear Pedram,

It is likely because the solver doesn't find a solution to your problem
you should be able to check the solve status and invoke the conflict refiner to display conflicting constraints with:

import docplex.mp.conflict_refiner as crm.solve()solve_status = m.get_solve_status()print(solve_status)if solve_status.name in [ 'INFEASIBLE_SOLUTION', 'INFEASIBLE_OR_UNBOUNDED_SOLUTION']:         cref = cr.ConflictRefiner()    print('show minimal conflict')    cref.refine_conflict(m, display=True)

I hope this helps,

  Cheers,

------------------------------
Renaud Dumeur
------------------------------