GAMS World Forum

Hi Steve, thank you so much for your answer. It really helped with the intuition behind it. For everybody who stumbles across this matter in the future: I just found a chapter in the PATH solver that specifically names this problem: https://www.gams.com/latest/docs/S_PATH.html#PATH_PITFALLS The sent...

Hi omarrossan, First of all, the line **** $145 $145,278 $148,133$148,133,133,654,300 helps you to find the precise spot within the equation where the error plopped up. Have a look at your listing file and you'll see that it is right under the variable or parameter that caused the issue. Here you ca...

Dear all, I'm working with MCP equations, so the arrangements of equations are important. To match an equation with a variable that has a lower bound , I need to set it up with a ≥ sign. So, like this: eq_inequation var1**2 =g= 9 not as eq_inequation .. 9 =l= var1**2 This is easy enough for me. Howe...

Hi mlftx. Please specify your question by giving some example of what you want to do. The image that you attached is - at least for me - not visible. Just guessing, you might benefit from reading about Conditional Expressions, Assignments and Equations: https://www.gams.com/latest/docs/UG_CondExpr.h...

Hi Bussiek, thank you for taking the time o look into my problem. Your code didn't give the sets that I desired, but I think you have a good point that I need to execute everything at compile time. So I've been sitting over this for quite a while since your answer - I couldn't make the Python code w...

Hi everyone. I'm trying to create some sets with Python, but I lack any knowledge about Python and am running into some problems (right now, Python says mapping_com_rest would not be defined - but I'm sure there are more errors. I also noticed that some code of mine already worked with "$onembe...

Hello Steve, Thank you for your reply. I suppose you meant to set the initial goal to min f(x) := (x-1)**2. I ran it with your suggested domains and some additional ones, such as [-2;0] or [2;5], to see which solution the model chooses if neither x.lo, nor x.up, nor anything in between is able to so...

Dear all, in the general explanation of MCPs, it is stated that MCP models can solve problems where F(z) ⟂ z.lo ≤ z ≤ z.up Meaning that one of three conditions can hold F(z) > 0 while z.lo = z F(z) = 0 while z.lo ≤ z ≤ z.up F(z) < 0 while z = z.up https://www.gams.com/latest/docs/UG_ModelSolve.html#...