Jonathan Eckstein

OK, thanks for checking.  I will just delete the constraints and add back modified ones.  I suspect that will be slow, but this is a prototype, proof-of-concept implementation, so its speed is not ...

OK, thanks!  Please let me know what you find out. Setting up my objective function with only scalar variables would be hellish.  I suppose that I could make big pile of scalar variables, each with...

Here is a 12-line program that produces the same error.  Possibly I am doing something really dumb, but it is my first time with this API.  Optimizing the model instead of updating doesn't change t...

Yes, I did update the model first.  I'll try to post a self-contained example soon.