How can I hide CPLEX's output in AMPL?

Question

I want to hide messages like

CPLEX 12.5.1.0: integer infeasible.
319 MIP simplex iterations
0 branch-and-bound nodes
No basis.

I don't mind hiding successful messages or not, but I don't want unsuccessful messages.

I have tried

• option cplex_options 'wantsol=8';
• option cplex_options 'logfile=rubbishFile.txt';
• option cplex_options 'tunedisplay=0';
• option cplex_options 'incompat=0';

But don't work.

Answer 1

I suspect that those lines are actually printed by the AMPL environment. Depending on what you want, please try these after suppressing all output from CPLEX:

• option cplex_options 'outlev=0'; (this should quiet CPLEX) and

• option solver_msg 0; or

• solve >rubbishFile.txt;

Hope this helps.