model.addConstr() does not work?

Answered

Jozsef Janosik

December 18, 2019 15:33

Hii

does anybody know why this code gives

Error code = 20001
Not in the model

message ?

GRBVar v1, v2;

v1 = model.addVar(-10, 10, 0, GRB_CONTINUOUS);
model.addGenConstrAbs(v2, v1);

0

Comments

2 comments

Official comment
Simranjit Kaur

Gurobi Staff

June 23, 2025 03:19 Edited
This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
Eli Towle

Gurobi Staff

December 18, 2019 17:36
Hi Jozsef,

Before adding a constraint that includes v2, can you try first adding v2 to the model with the GRBModel.addVar() method (like you do with v1)? You declare v2 to be of type GRBVar, but it is not defined for any particular model.

Thanks!

Eli
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