[Bonmin] HELP - An AMPL model can't be solved by bonmin

[霍瑛]

Dear All,I have an AMPL model that can be solved using bonmin. The files are "randA.dat 5-10mod 5-10run". The error message is "The LP relaxation is infeasible or too expensive".I guess maybe the problem is too large to be solved, thus I decrease the number of variables. The new files are "randA.dat 3-5mod 3-5run", and it can be solved.bonmin: Optimal
use [*] :=
 4  1
 7  1
15  1
;But I need to solve the old problem. Would it be useful to change some options? But which options would be changed?


Besides, I tried to use the couenne solver, there is an error."couenne: ANALYSIS TEST: ERROR: unknown operator". 


I know I may use operators that are not supported by Couenne from "http://list.coin-or.org/pipermail/couenne/2012-June/000304.html"


If possilbe, can you point out which function is making trouble? Can the couenne solve my problem?






Thank you very much!


Ying Huo
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