[Ipopt] problem with ma77

[Sebastien Lengagne]

Hi,

I can solve my problem with the linear solvers ma27, ma57 and mumps but
when I can use Ipopt with ma77,I get the following errors:

This is Ipopt version 3.10, running with linear solver ma77.

2189 variables, 24534 constraints.
Number of nonzeros in equality constraint Jacobian...:        0
Number of nonzeros in inequality constraint Jacobian.:  2230748
Number of nonzeros in Lagrangian Hessian.............:        0


  Error return from MA77_open. Error flag = -12
  filename = ma77_int

  Error return from MA77_input_vars. Error flag =  -3
  Error on input of element/row =        1
  Error in sequence of calls.
Total number of variables............................:     1805
                      variables with only lower bounds:        0
                 variables with lower and upper bounds:     1805
                      variables with only upper bounds:        0
Total number of equality constraints.................:        0
Total number of inequality constraints...............:    24534
         inequality constraints with only lower bounds:     1025
    inequality constraints with lower and upper bounds:    18000
         inequality constraints with only upper bounds:     5509

  store the temporary optim.opf file
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du 
alpha_pr  ls
    0  1.7645758e+02 1.27e+00 1.00e+02   0.0 0.00e+00    -  0.00e+00 
0.00e+00   0

  Error return from MA77_open. Error flag =  -3
  Error in sequence of calls.

  Error return from MA77_input_vars. Error flag =  -3
  Error on input of element/row =        1
  Error in sequence of calls.
WARNING: Problem in step computation; switching to emergency mode.
    1r 1.7645758e+02 1.27e+00 9.99e+02   0.1 0.00e+00    -  0.00e+00 
0.00e+00R  1

  Error return from MA77_open. Error flag =  -3
  Error in sequence of calls.

  Error return from MA77_input_vars. Error flag =  -3
  Error on input of element/row =        1
  Error in sequence of calls.
WARNING: Problem in step computation; switching to emergency mode.
Restoration phase is called at point that is almost feasible,
   with constraint violation 5.047503e-13. Abort.
Restoration phase in the restoration phase failed.



Do you know why I cannot use ma77, or where I can find the 
siginification of the error flags ?

Thank you

-- 
Sébastien LENGAGNE, Ph.D
Institute for Anthropmatics
Humanoids and Intelligence Systems Lab
Adenauerring 2, D-76131 Karlsruhe, Germany
Building 50.20, EG, Room 017
mail : lengagne at kit.edu
webpage: http://www.rz.uni-karlsruhe.de/~kf218/

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