My objective function is the following.

maximize sum (t in techs) (log(q*exp(-(ys[t] - ys

All the variables there are dvars, except for ystechs which is a float data array.

Is this function not possible for CPLEX to compute the optimum for? Or is there a simplified expression that CPLEX will be able to do?

This is for a maximum log likelihood calculation.

Thanks!