Hello, I am new to using Julia/JuMP (coming from python) and I am encountering the following error when trying to solve an LP model using Gurobi

I dont quite follow what the statement “AssertionError: rowub[i] < posinf” means. I have narrowed it down to something related to introducing a variable in the model that can take positive and negative values, but am not sure how to proceed further. I was wondering if someone can explain how to interpret the error to help me proceed forward.

Version: Julia 1.2.0

CSV v0.5.23

DataFrames v0.20.0

Gurobi v0.7.4

JuMP v0.18.6

MathProgBase v0.7.7

StatsBase v0.32.0

LinearAlgebra