问题
I am trying to load a CPLEX LP file in to CPLEX using the "read" command. I believe that in this problem, I have a set of constraints that are quadratic. But, from what I understand CPLEX will still attempt to solve quadratic programming problems.
However, when I try to read it in, I get this error:
CPLEX Error 1437: Line 284: Illegal quadratic constraint sense.
Is there something special I need to do to read in a quadratic programming problem?
NOTE: I am able to load this LP file in to scip and solve it using: scip -f
回答1:
The quadratic constraints must be convex. You can only constrain a convex function from above or a concave function from below. Quadratic equality constraints are never convex. That's likely your problem.
来源：https://stackoverflow.com/questions/10112348/trying-to-read-quadratic-program-in-cplex-get-error