[Ipopt] IPOPT and CUTEr

[Andreas Waechter]

Hi Jonathan,

The size of some CUTEr problems (incl. AUG2D) can be changed.  Maybe the 
difference comes from you looking at a differently sized instance?  The 
sizes can be changed in the SIF file or on the command line with the CUTEr 
tools.

Hope this helps,

Andreas

On Tue, 24 May 2011, Jonathan Hogg wrote:

> Dear all,
>
> Just wondering if anyone had successfully made IPOPT work with CUTEr
> recently?
>
> I've tried it with various linear solvers, but can't seem to get the
> "right" answer for several problems, even where almost every other
> solver under the sun seems to agree (of course some problems will have
> more than one local optimal, but I think I'm picking convex QPs mainly)
>
> One particular example where everyone else seems to agree is AUG2D,
> where I believe the correct answer is 1.6877257114E+06, but IPOPT/MA57
> is getting 3.3748235057934504e+06 (other solvers incl some reported by
> Andreas agree with the first answer at least in the first few sf).
>
> Thanks,
>
> Jonathan.
> -- 
> Scanned by iCritical.
>
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