[Coin-ipopt] "Termination code 11"?

[David Elixmann]

Hello all,

What does it mean when IPOPT gives me the following output...



 14  1.2076559e+03 1.37e+00 4.34e+05  -1.0 2.26e+04    -  3.02e-01 1.00e+00h  1
  15  1.1136576e+03 8.77e+00 1.69e+06  -1.0 5.66e+04    -  5.06e-01 5.00e-01h  2
  16  1.1360102e+03 1.10e+01 1.18e+07  -1.0 1.09e+04    -  1.00e+00 2.50e-01h  3
  17  1.0805234e+03 5.36e+00 7.07e+10  -1.0 3.29e+01  -1.0 1.00e+00 1.00e+00h  1
MA27BD returned iflag=-4 and requires more memory.
 Increase liw from 3387610 to 33876100 and la from 4971225 to 50840810 and factorize again.
  18  1.0811726e+03 5.36e+00 7.33e+10  -1.0 5.82e+02  -1.4 1.00e+00 1.95e-03h 10
  19r 1.0811726e+03 5.36e+00 1.00e+03   0.7 0.00e+00    -  0.00e+00 2.68e-07R 20
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
  20r 1.0818589e+03 3.83e+00 6.33e+03   0.7 1.71e+03    -  3.19e-01 3.67e-03f  1
error running ipopt:
        termination code 11




does "Termination code 11" mean that it ran out of memory, or is there a problem with my model, or the objective function? (It is a badly conditioned parameter estimation problem.)

Also, is there a list somewhere what the different termination codes mean? I keep getting them every now and then, and while sometimes it's easy to pick up what went wrong, sometimes it really isn't, and it could help to know what IPOPT's last words mean...

Best regards and thanks,

David
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