GAMS World Forum

Hi Fred,
Thank you for your prompt reply. It solves my problem perfectly.
Just as you said, I misinterpret the GAMS syntax 'j ≠i ' as 'j<>i '.
Again, thank you!

Best,
Li

Hello all, I want to programm a formulation: sum(t, sum(j∈N & j≠i, P(i,j,t))). The code is as follows: set i / 1,2,3 / t / 1*24 /; alias(i,j); sum((t,j)$(t,j<>i), p(i,j,t)) However, the programm repor some errors: 148 Dimension different - The symbol is referenced with more/less indices as decla...

It works
Thank you very much！！

Best,
Li

Hi Renger, Thanks for your answer. In my purpose, I exactly want to minimize each ETA (ETA(1), ETA(2), ETA(3)) because I want to utilize some distributed algorithm. And p_pvf(i,t) is a variable in my future formulation. Could you give me some advice to write it under the rule "write one objecti...

Hello all,
I have difficulties in solving my problem. Can someone help me with GAMS Error 148

Error Messages
148 Dimension different - The symbol is referenced with more/less
indices as declared
257 Solve statement not checked because of previous errors

Thank you,
Li

Hi Fred,
Thanks for your reply.
I have no idea to deal with my programm now. I just want to solve it with the status "1 optimal" through adding some constrains. In this case, could you tell me how to modify it?

LI

Hi Fred,
The attachment (Untitled_2_log) should be the log file (reslim=30000), I'm sorry to make a mistake.
The GAMS and Cplex is a old version because I'm a student, and I cannot afford the License even the acadamic license. Thanks for your pertinent suggestion.
LI

Hi Michael,
Thanks for your repely.
I update the new file as Fred suggestion, please see the attachment under the new reply.
Again, thank you very much for your patience.

LI

Hi Fred, Thanks for your reply again. I try to set "option reslim=3000, 5000", the result is same as "reslim=1000". When I set reslim=30000, SOLVE SUMMARY is **** SOLVER STATUS 4 TERMINATED BY SOLVER **** MODEL STATUS 14 NO SOLUTION RETURNED Because of the Absolute gap is so huge...

Hi Fred, Thank you very much for your reply. I set optcr=0 when the SOLVER STATUS is "1 OPTIMAL", and the result of MODEL STATUS is "1 OPTIMAL ". However, I guess the description of my model is not correct when the SOLVER STATUS is "3 resource interrupt". I tried to che...