Eli Towle

Hi Runqing, tupledict.prod() returns a LinExpr object. You can use the LinExpr.getValue() method to retrieve the value of a linear expression evaluated at the current solution. In your case, you sh...

Hi, You can specify a MIP start vector by setting the Start variable attributes. An example of how this is done in Java can be found in the Facility.java example, part of the examples library. To b...

Hi Jose, To create a block of code, there is a "code" formatting option available when writing a post. Here is a picture: This forum uses MathJax to render math notation. To create the equation sy...

Hi Amin, Great, I'm glad that helped! The \( q \) field is the vector defining the linear term on the left-hand side of the quadratic constraint. For example, the linear term of the first constrain...

Hi Monir, Great, thanks for posting the log. Considering what MIPGapAbs does, it looks like Gurobi is behaving as expected - the absolute difference between the lower and upper bounds never gets cl...

Hi Monir, Could you post your log file from the run with these parameters? Note that MIPGapAbs refers to the absolute difference between the lower and upper bounds. This means that Gurobi should st...

Hi Jose, sys.argv is a list of the command-line arguments used when running the program. The first argument is always the name of the program. The tsp.py example is meant to be run from the command...

Hi Rohan, You could see this error if you are trying to read a solution file into a model with no variables. Did you add variables to the model (named to match the variables in the .mst file) prior...

Hi Gonzalo, Yes, your interpretation is correct - the MIPNODE callback indicates the exploration of a spatial branch-and-bound node, and the MIPSOL callback indicates that a new QCQP-feasible solut...

Hi Tobias, The documentation you linked is for the .NET API. This syntax doesn't work in Java (which doesn't support operator overloading). Instead, you can use the GRBLinExpr.add() and GRBLinExpr....