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Hi,<br>
<br>
I can solve my problem with the linear solvers ma27, ma57 and mumps
but <br>
when I can use Ipopt with ma77,I get the following errors:<br>
<br>
<small>This is Ipopt version 3.10, running with linear solver ma77.<br>
<br>
2189 variables, 24534 constraints.<br>
Number of nonzeros in equality constraint Jacobian...: 0<br>
Number of nonzeros in inequality constraint Jacobian.: 2230748<br>
Number of nonzeros in Lagrangian Hessian.............: 0<br>
<br>
<br>
Error return from MA77_open. Error flag = -12<br>
filename = ma77_int<br>
<br>
Error return from MA77_input_vars. Error flag = -3<br>
Error on input of element/row = 1<br>
Error in sequence of calls.<br>
Total number of variables............................: 1805<br>
variables with only lower bounds: 0<br>
variables with lower and upper bounds: 1805<br>
variables with only upper bounds: 0<br>
Total number of equality constraints.................: 0<br>
Total number of inequality constraints...............: 24534<br>
inequality constraints with only lower bounds: 1025<br>
inequality constraints with lower and upper bounds: 18000<br>
inequality constraints with only upper bounds: 5509<br>
<br>
store the temporary optim.opf file <br>
iter objective inf_pr inf_du lg(mu) ||d|| lg(rg)
alpha_du alpha_pr ls<br>
0 1.7645758e+02 1.27e+00 1.00e+02 0.0 0.00e+00 -
0.00e+00 0.00e+00 0<br>
<br>
Error return from MA77_open. Error flag = -3<br>
Error in sequence of calls.<br>
<br>
Error return from MA77_input_vars. Error flag = -3<br>
Error on input of element/row = 1<br>
Error in sequence of calls.<br>
WARNING: Problem in step computation; switching to emergency mode.<br>
1r 1.7645758e+02 1.27e+00 9.99e+02 0.1 0.00e+00 -
0.00e+00 0.00e+00R 1<br>
<br>
Error return from MA77_open. Error flag = -3<br>
Error in sequence of calls.<br>
<br>
Error return from MA77_input_vars. Error flag = -3<br>
Error on input of element/row = 1<br>
Error in sequence of calls.<br>
WARNING: Problem in step computation; switching to emergency mode.<br>
Restoration phase is called at point that is almost feasible,<br>
with constraint violation 5.047503e-13. Abort.<br>
Restoration phase in the restoration phase failed.</small><br>
<br>
<br>
<br>
Do you know why I cannot use ma77, or where I can find the
siginification of the error flags ?<br>
<br>
Thank you<br>
<pre class="moz-signature" cols="72">--
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 : <a class="moz-txt-link-abbreviated" href="mailto:lengagne@kit.edu">lengagne@kit.edu</a>
webpage: <a class="moz-txt-link-freetext" href="http://www.rz.uni-karlsruhe.de/~kf218/">http://www.rz.uni-karlsruhe.de/~kf218/</a>
</pre>
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