Tobias Achterberg
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Recent activity by Tobias Achterberg
This is a delicate issue. We only promise that we will be able to detect the following two cases as convex: 1. x^T Q x <= d with PSD matrix Q2. sum xj²  y² <= 0 with y >= 0 But Gurobi will also be...

You need to add each of your constraints with m.addConstr().

In your formulation, I think that you always need to use (1  bi) for all the bigM constraints as you have formulated them.

I think that your bigM constraints are wrong. For example, b1=0 will force I[v][i] <= 120*SOC_avg[v][i] due to the first bigM constraint. This is not what you want. You only want to force constra...

For example, say you have four different regions based on the relationship of x and y in which you have different objective functions. Then you need four binary variables to indicate in which regio...

The log file looks okay. It seems pretty difficult to find a feasible solution for your model. What you see in the table is the output of the branchandbound tree search. The algorithm successivel...

This is actually not a bug. It is due to the large (actually, infinite) domains of your variables and the consequences that this has for the piecewise linear approximation that we use for the log ...

This looks like a bug. Thanks for reporting! I will investigate and check what is going on. Tobias

Yes, you can do this manually. But you can also just use the "and" general constraint: addConstr(z == and_(x,y)). Moreover, you can just stick with your quadratic objective function as indicated in...

In very rare cases it may even help to also use barrier for the local node relaxations. There is of course the very big downside that barrier cannot benefit from the warm start information that you...