column generation with c++

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Kechen Ouyang

January 17, 2022 14:12

I'm trying to use column generating with gurobi and c++. I encounter some problem when adding a new variable.

I first create a new column:

and then add a new variable:

There is something wrong with the addvar, but I don't know what the reason is. Is anyone can help me? Thank you!

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Official comment
Simranjit Kaur

Gurobi Staff

November 16, 2025 23:45
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.
Mario Ruthmair

Gurobi Staff

January 18, 2022 13:59
Hi Kechen,

What exactly is the error message you get?

In addVar() you use NULL for a string argument (name). Since the name parameter is optional, you can just skip it.

Best regards,
Mario
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