Originally posted by: chinaboy

using CP;

int nbJobs = ...;
int nbMchs = ...;

range Jobs = 0..nbJobs;
range Mchs = 0..nbMchs-1;

int arrivalTimehttp://0..nbJobs=...;
int OpDurationsj in Jobsm in Mchs = ...;

dvar int s j in Jobsm in Mchs;
dvar int cj in Jobsm in Mchs;
dexpr float gj in Jobsk in Jobsm in Mchs= sj in Jobsm in Mchs> sk in Jobsm in Mchs?1:0;

execute {
cp.param.FailLimit = 100000;
}

minimize max(j in Jobs, m in Mchs) c[j][m];
subject to {

forall (j in Jobs,m in Mchs)
s[j][m]>=arrivalTime[j];
forall (j,k in Jobs:j!=k,m in Mchs)
sj in Jobsm in Mchs>=(sk in Jobsm in Mchs+OpDurations[k][m])*gj in Jobsk in Jobsm in Mchs;
forall (j,k in Jobs:j!=k,m in Mchs)
sk in Jobsm in Mchs>=(sj in Jobsm in Mchs+OpDurations[j][m])*gj in Jobsk in Jobsm in Mchs;
forall (j in Jobs,m in Mchs)
c[j][m]==s[j][m]+OpDurations[j][m];

I think the problem comes from the underline sentence,
#CPLEXOptimizers
#DecisionOptimization