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OpenSolver is moving from the GPL to the Common Public License (CPL), the license favoured by the COIN-OR community. We’ll be releasing a new version shortly (with a few minor improvements) under this license.

Mike Trick, who visited New Zealand a few years ago, has blogged about OpenSolver. This has generated an interesting discussion about the GPL license, and whether this will limit what people want to do with OpenSolver. I’ve been having similar discussions with Ted Ralphs, the CBC maintainer, and Stu Mitchell of PULP fame. If anyone wants OpenSolver to be available under another license, then please let me know.

As well as all the contributions Mike made to OR in New Zealand during his stay, I also have to thank him for his Travelling Umpire Problem (TUP) which kept my Heuristics class very busy.

I hadn’t come across Larry’s IEOR Tools site before following the link on his OpenSolver comment. He too has written about OpenSolver. He’s created an interesting site with a good open source emphasis that I’ll be visiting more often.

Andrew

Some of you may have arrived at this site by clicking on a Google ad. This is an experiment that’s possible thanks to the free Google credits provided by our GoDaddy hosting plan.  On our first day we’ve had 5 click-thru’s, all for a total cost of nz$1.20 a day!

OpenSolver has now moved from wordpress.com over to our GoDaddy hosted site. It took a while (longer than I’d expected, and with too many GoDaddy hiccups), but it is now up and running. Enjoy. Andrew

Welcome to OpenSolver, the Open Source linear and integer optimizer for Microsoft Excel. This is our first release of OpenSolver.