[Help-glpk] glpk numerical instability in 4.1, not in 4.0

[Joseph Park]

Greetings,

 

the attached model file performs as expected with GLPK 4.0,

however, with 4.1 it generates a numerical instability, and apparently

fails in the integer optimization. The platform is RedHat with gcc

(see attached diff file.)

 

I hope to employ GLPK to solve large problems concerning water

resource allocation and delivery in South Florida. The GLPK API

is ideal for this, as the API allows us to incorporate state-information

updates to the model parameters from our hydrological numerical

model. However, the difference in performance between 4.0 and 4.1

on the simple model raises concern that GLPK may not be robust

enough for the task.

 

Thanks for your time, and the excellent work in providing/maintaining

the GLPK.

 

 

glpk_version_diff.txt
Description: Text document

glpk_mse.mod
Description: Binary data