I am trying to use Gurobi's MVar class. Answer Call before accessing lb.

Callm.update()before accessing lb.

Gurobi MVar: Accessing Attributes always throws a GurobiError

cherrywoods

asked 30 Sep, 2022

I am trying to use Gurobi’s MVar class.

import gurobipy as gp

m = gp.Model()
v = m.addMVar((10,))
v.lb  # raises GurobiError, index out of range...

JavaScript
​x
 
import gurobipy as gp
​
m = gp.Model()
v = m.addMVar((10,))
v.lb  # raises GurobiError, index out of range...
​
​

Call

m.update()

JavaScript
 
m.update()
​

before accessing lb.