GAMS World Forum

Dear all, I used a PMP model to simulate the farmer's behaviour in three different conditions of water pricing policies and water availability in a context of conjunctive use of water resource ( surface and groundwater). The surface water is managed by a Water user Association who define the pricing...

Thank you, so it's just a matter of precision but model can find the solution. I've just noticed that the tolerance was not the only " porblem" in the lst. file GAMS report also: ** Warning ** The value of LFITER is out of range. LFITER is decreased from 2147483647 to 1000000000. Pre-trian...

Dear Fred, Thank you so much for your help! Actually, following your suggestion the problem of inconsistence disappear and the calibration improved! However, another problem rise up, now GAMS tell me: ** Optimal solution. Reduced gradient less than tolerance. "The solution is a locally optimal ...

Hi everyone! I'm trying to calibrate a PMP model trough the Ward Method but I can't. I would liketo represent the irrigated crop pattern of an irrigated area in Southern Italy. The equation system is characterized by: GM maximization subject to LAND constraint, WATER constraint and LABOUR constraint...

Hi everyone! I'm trying to calibrate a PMP model trough the Ward Method but I can't. I would liketo represent the irrigated crop pattern of an irrigated area in Southern Italy. The equation system is characterized by: GM maximization subject to LAND constraint, WATER constraint and LABOUR constraint...