Indicator constraint in python console

Answered

Job Overbeek

May 13, 2022 21:10

• 
• 

Hello,

I was just trying to add conditional constraints to my model using the addGenConstrIndicator() method. However when I check the model status in my python console the number of constraints does not change. If I include it using a big M formulation the model does show an additional constraint.

How should I interpret this? Is there something wrong with my addGenConstrIndicator()? Is this something specific to the python console?

big M constraint. Constraints increase from 60 to 61.

Indicator constraint: The number of constraints does not increases but remains 61.

 

Thanks

 

0

• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 16, 2025 23:37

  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 try Gurobot, our chatbot interface offering instant, expert-level support.
• 

  Jaromił Najman

  • Gurobi Staff

  May 15, 2022 08:19 Edited

  This output only lists the number of linear constraints (the NumConstrs attribute). Indicator constraints are general constraints. To get the number of general constraints, you have to query the NumGenConstrs attribute.

  miqp.NumGenConstrs

  0

Post is closed for comments.