generating .sol files

[Ivet Galabova]

Hi,

I have a nonlinear solver written Fortran 77 and I'm writing an interface to AMPL in C. I generate a .sol file with

write_soln(char* msg, double* x, NULL);

the values of x that I pass are correct. When called form AMPL the msg gets printed but then I get

exit code 1
<BREAK>

with solve_exitcode 256.

when I type 

"display x;"

it will display the starting point. The .sol file looks like

optimal solution found.
0 iteraions, 88.200000 objective

Options
3
0
1
0
4
0
8
8
0
0
0
0
46.67
0
0
0

For comparison the .sol file generated by Minos for the same problem is

MINOS 5.51: optimal solution found.
6 iterations, objective 88.2

Options
3
0
1
0
4
4
8
8
0.0018181818181818108
0.008181818181818278
0.11599999999999991
-8.169327588411304e-18
0
0
0
0
46.66666666666666
1.5761812194954111e-15
8.429823983987501e-15
0
objno 0 0
suffix 0 8 8 0 0
sstatus
0 3
1 3
2 3
3 3
4 1
5 1
6 1
7 3
suffix 1 4 8 0 0
sstatus
0 3
1 3
2 3
3 1

Could you please tell me what am I doing wrong?

Any help is much appreciated!

Thanks in advance
Ivet

[Ivet Galabova]

I've got

double xArray[n_var]; and call

write_soln(buffer , &xArray, NULL) ;

when I compile the solver I also get

filter.c:243: warning: passing argument 3 of ‘write_sol_ASL’ from incompatible pointer type
asl.h:1067: note: expected ‘double *’ but argument is of type ‘double (*)[(long unsigned int)(asl->i.n_var_)]’

[victor.z...@gmail.com]

You should pass xArray instead of its address to write_soln (that's what compiler is complaining about):

  write_soln(buffer, xArray, NULL);

HTH,

Victor

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