John Forrest

I have modified Clp/master so that it recognizes that barrier will use too much memory and switch to simplex. Looking at the flop count, barrier would have taken several years!...

Michel, Thank you for your interesting observations. I notice that 2.10.0 took 168 nodes to get best solution (total nodes 18460) and 2.10.3 only took 53 nodes (total 21053).  So...

I have no intention of changing the code to allow neos-5044663-wairoa.mps.gz to be read The image in error is C0063540 LB_full 0 $ empty column and there is a comment...

Domingo, INDICATORS is not just a format issue - I will look and see if it is useful for Cbc. Ihave put into master (should be safe in stable as...

I am not very familiar with the DINS heuristic, but debugging I find that the heuristic is entered with a solution - but the solution had been found outside that...

Unable to reproduce exact bug in 1.17.5. I have found some problems when adding rows/columns in odd ways. I have updated ClpModel.cpp in stable/1.17. It is safe to copy ClpModel.cpp...

Ran addRows.cpp with 1.17.5 (and stable/1/17) - error occurred - new ClpModel.cpp fixed. On 30/09/2021 14:07, Mizux wrote: > @jjhforrest did you manage to run > https://github.com/coin-or/Clp/blob/master/examples/addRows.cpp > ? like...

Ted, While debugging and modified, I did get that error with addRows.cpp. Definitely did not get that error with modified ClpModel.cpp i.e. current Clp/stable/1.17 John On 03/10/2021 22:44, Ted Ralphs...

I copied the latest stable versions of Clp and CoinUtils to Clp-1.17.4 and CoinUtils-2.11.4 to or-tools and got the seg fault. I have fixed in stable/1.17 and that works. The...

It does look as if local tree search is broken. In debug mode, I get assert failures on some problems. I have tried some simple fixes, but it may need...