[Fwd: 4.60 script not working in 4.65]

[Andrew Makhorin]

-------- Forwarded Message --------
From: Diederik Veenendaal <diederik.veenendaal@gmail.com>
To: help-glpk@gnu.org
Subject: 4.60 script not working in 4.65
Date: Tue, 10 Nov 2020 09:28:13 +0100

> Dear Andrew,
> Thank you for providing GLPK. I'm trying to share a knapsack ILP
> script that works on my computer with someone else, but it fails on
> his computer.
> We're both running GLPK through CVXOPT, installed via Anaconda.
> However, I'm using v4.60, and he has installed v4.65. I'm unable to
> install an older version of GLPK through Anaconda. 
> I'm not sure where to even begin to look, because I don't understand
> if the problem is with my script, with CVXOPT or with GLPK.
> I hope the problem is familiar, or that you can point me in some
> possible directions.
> Kind regards,
> Diederik
> The script runs identical until an LP solution is found, but then
> deviates.
> My computer:
> OPTIMAL LP SOLUTION FOUND
> Integer optimization begins...
> +    12: mip =     not found yet >=              -inf        (1; 0)
> Solution found by heuristic: -1500
> Solution found by heuristic: -1560
> Solution found by heuristic: -1570
> Solution found by heuristic: -1610
> Solution found by heuristic: -1620
> +   185: mip = -1.620000000e+003 >=     tree is empty   0.0% (0; 205)
> INTEGER OPTIMAL SOLUTION FOUND
> His computer.
> OPTIMAL LP SOLUTION FOUND
> Integer optimization begins...
> Long-step dual simplex will be used
> +     0: mip =     not found yet >=              -inf        (1; 0)
> +     0: >>>>>  0.000000000e+000 >=  0.000000000e+000   0.0% (1; 0)
> +     0: mip =  0.000000000e+000 >=     tree is empty   0.0% (0; 1)
> INTEGER OPTIMAL SOLUTION FOUND
> Wrong parameter 1 in LAPACKE_cgtsv_work
> Wrong parameter 1 in LAPACKE_cgtsv_work
> Wrong parameter 1 in LAPACKE_cggesx_work
> Wrong parameter 1 in LAPACKE_cggesx_work
> Wrong parameter 1 in LAPACKE_cggesx_work