[Coin-discuss] Another Clp QP question

[Sebastian Nowozin]

Thanks John,

John J Forrest wrote:

> SLP is a fairly rugged trust region approach. If I have to solve a large 
> QP I do something like -
> switch off presolve as there may be bugs
> nonlinearSLP(20,1.0e8) i.e. just a few iterations - although that can vary
> primal() which works a lot lot better given a near optimal solution

Are you sure you mean 1.0e8, or 1.0e-8?

My best working configuration right now is disabling presolve and 
crossover and using the barrier method.  It is quite slow but never 
crashed or had some problems on all problems I tested.  That does the 
job for me, but in general the absence of a decent QP solver in the 
open-source world is saddening.

Thanks for all the work,
Sebastian