Originally posted by: MarcosThomaz

I have a simple model:

using CP;
int n = ...;
range rjobs = 0..n-1;
int p[rjobs] = ...;
int w[rjobs] = ...;
int d[rjobs] = ...;
 
tuple Job{
    key int id;
    int p;
    int w;
    int d;
}

{Job} Jobs = {<i+1, p[i], w[i], d[i]> | i in rjobs};

dvar interval itvs[j in Jobs] size j.p;
dvar sequence pitvs in itvs;

minimize sum(j in Jobs) maxl(0, endOf(itvs[j])-j.d) * j.w;

subject to{
    noOverlap(pitvs);
}

I followed as shown in this link: https://www.ibm.com/support/knowledgecenter/SSSA5P_12.6.3/ilog.odms.ide.help/OPL_Studio/refoplide/topics/opl_ideref_intell_ed_lped_export_to_lpfile.html

For another models, works, but any model using Interval and Sequence don''t. I'm using Cplex V. 12.6.3.

Does anyone know how to export this model to lp format?

Thanks,

Hi,

this is normal.

Instead of .lp you should use .cpo for cp models

regards

Originally posted by: MarcosThomaz

Thanks Alex. 

Why doesn't works with .lp when my model has a Interval and/or Sequence? 

For another model works. 

Hi,

as soon as you use "using CP" you should export to a .cpo

https://www.ibm.com/support/knowledgecenter/SSSA5P_12.7.0/ilog.odms.ide.help/OPL_Studio/refoplide/topics/opl_ideref_intell_ed_export_to_cpfile.html

regards

Originally posted by: MarcosThomaz

Ok Alex. But I think this is an undocumented error, because the version I use is exactly the same as described in the topic I mentioned.
Thank you anyway.