[Couenne] Round function with Couenne package

[Mahmut Tutam]

Hello,

I am using Couenne open source software with AMPL to solve my
nonlinear-integer optimization problem. I do not know how to tell AMPL to
round a function depending on the variable. For example, the following
function is one of the constraints in my optimization problem such as n is
variable; and a and nk are parameters. t[i] = round((i * a * n) / (a * (nk
+ 1));. I know I can use ceil function with CPLEX, but CPLEX can not solve
a nonlinear-integer optimization problem. If I use ceil function in
Couenne, it says ceil is not implemented. Would you please share me if
there is a way to deal with this problem? or should I use another software
package to solve my problem?

Sincerely,
Mahmut
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