[Ipopt] problems on OS X 10.7 Lion

[Jonathan Hogg]

I'm not too familiar with the Ipopt matlab interface, and this may 
already be taken care of there, but given the variety of different 
Fortran compilers recommended by Mathworks on different platforms it 
might not be:

One generic problem with matlab mex files is that you need to be careful 
which BLAS you end up using - matlab's own BLAS library is ILP64, which 
won't work with most Fortran compilers unless you've forced default 
integer to be 64-bit (gfortran -fdefault-integer-8). Alternatively link 
against a standard BLAS library rather than Matlab's.

It may be worth checking if this is the case? It would certainly be one 
explanation for the errors you are reporting.

Jonathan.

On 14/10/11 22:10, Ray Zimmerman wrote:
> Here's an update ...
>
> 1. As I suspected, it's unrelated to the hardware specs. When I rebooted
> the machine under Snow Leopard, my MEX builds work fine. I only mention
> this since I have encountered software for which the 64 GB of RAM
> triggered bugs.
>
> 2. After upgrading to Mac OS X 10.7.2 and Xcode 4.2, I see no change.
>
> 3. I was able to successfully compile Ipopt and the MEX interface using
> MA57 as the linear solver instead of MUMPS. In this case, the 'make
> test' step for Ipopt does not show any failures, at least in the several
> attempts I tried. However, the MEX file, while it executes, does not
> pass most of my tests and still spits out lots of ...
>
> WARNING: Problem in step computation; switching to emergency mode.
>
> ... even for the examples in Ipopt/contrib/MatlabInterface/examples.
>
> Any ideas?
>
> --
> Ray Zimmerman
> Senior Research Associate
> 419A Warren Hall, Cornell University, Ithaca, NY 14853
> phone: (607) 255-9645
>
>
>
>
> On Oct 12, 2011, at 12:49 PM, Ray Zimmerman wrote:
>
>> I used the same basic instructions as in my previous post about
>> building Ipopt and the Matlab interface on Mac OS X Snow Leopard
>> (http://list.coin-
>> <http://list.coin-/>or.org/pipermail/ipopt/2011-October/002609.html
>> <http://or.org/pipermail/ipopt/2011-October/002609.html>) to attempt
>> to build them on a different machine running OS X Lion 10.7.1, with
>> the dev tools from XCode 4.1 and the gfortran for Lion
>> (gfortran-lion-5666-3.pkg from http://r.research.att.com/tools/).
>>
>> Everything builds just fine, but when I run 'make test' for Ipopt in
>> step 4. I get inconsistent results. Sometimes it passes all 3 tests,
>> sometimes it fails one or more of the tests, and when they fail, it's
>> always in the same way, with the following sort of output.
>>
>> iter objective inf_pr inf_du lg(mu) ||d|| lg(rg) alpha_du alpha_pr ls
>> 0 1.6109693e+01 1.12e+01 1.21e+01 0.0 0.00e+00 - 0.00e+00 0.00e+00 0
>> WARNING: Problem in step computation; switching to emergency mode.
>> 1r 1.6109693e+01 1.12e+01 9.99e+02 1.1 0.00e+00 20.0 0.00e+00 0.00e+00R 1
>> WARNING: Problem in step computation; switching to emergency mode.
>> Restoration phase is called at point that is almost feasible,
>> with constraint violation 0.000000e+00. Abort.
>> Restoration phase in the restoration phase failed.
>>
>> I get this with both 32-bit and 64-bit builds.
>>
>> I assume this is related to MUMPS? Any ideas?
>>
>> I should mention that this is on a 12-core Mac Pro with 64 GB RAM, in
>> case those specs would somehow come into play. I've also noticed that
>> using a MEX file on this machine that I built under Snow Leopard on my
>> MacBook Pro often results in failures as well with the same warning
>> about "problem in step computation".
>>
>> My next step is to try building with Pardiso or another linear solver
>> to see if that fixes it, but if anyone has any ideas what might be
>> causing this, I'd love to hear them.
>>
>> --
>> Ray Zimmerman
>> Senior Research Associate
>> 419A Warren Hall, Cornell University, Ithaca, NY 14853
>> phone: (607) 255-9645
>>
>>
>>
>>
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>
>
>
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