[Ipopt] problems on OS X 10.7 Lion

[Ray Zimmerman]

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-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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