[Ipopt] IPOPT and CUTEr

[Jonathan Hogg]

Thanks for the replies all.

This seems to be a CUTEr issue on 64 bit machines. There is a cuter64 
branch in cuter2 svn that fixes these issues, but is still undergoing 
development.

Jonathan.

On 24/05/11 18:26, Andreas Waechter wrote:
> 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.
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