Problem with ignoring GAMS constraints
Posted: Tue Sep 19, 2017 4:38 am
Dear Sir or Madam,
I have developed a mid-sized minimization model (176 variables, 4180 constraints).
When I execute the model on different non-linear solvers I get results, which I plug it into an excel spreadsheet for analysis.
My problem is that my more complicated constraints are not honored (i.e. when i insert the values of x1, y1, x56 and y56 into the equation it is LESS THAN 54). Example
c407.. (x1-x56) * (x1-x56) + (y1-y56) * (y1-y56) =g= 54 ;
Simple constraints are honored. Example
c12.. x12 =g= 3 ;
How do I instruct the solver to honor the constraints exactly as they are written (a hard constraint) and if there is no solution, simply to say it is infeasible.
Thank you for your effort.
Chicago
I have developed a mid-sized minimization model (176 variables, 4180 constraints).
When I execute the model on different non-linear solvers I get results, which I plug it into an excel spreadsheet for analysis.
My problem is that my more complicated constraints are not honored (i.e. when i insert the values of x1, y1, x56 and y56 into the equation it is LESS THAN 54). Example
c407.. (x1-x56) * (x1-x56) + (y1-y56) * (y1-y56) =g= 54 ;
Simple constraints are honored. Example
c12.. x12 =g= 3 ;
How do I instruct the solver to honor the constraints exactly as they are written (a hard constraint) and if there is no solution, simply to say it is infeasible.
Thank you for your effort.
Chicago