Thanks, that must be the reason for the unexpected "integer solution".
If the model has been designed to be run always with NCAP_SEMI, you can then just activate DSC and set OPTCR in the Control Panel, or you can set OPTCR in the RUN file template (Option optcr=0.0; ).
But if you want to run the model as an LP formulation, I think it would be best to move the NCAP_SEMI definitions into a scenario file, which will be included in the run only when you want to run the model with the MIP formulation.
If the model has been designed to be run always with NCAP_SEMI, you can then just activate DSC and set OPTCR in the Control Panel, or you can set OPTCR in the RUN file template (Option optcr=0.0; ).
But if you want to run the model as an LP formulation, I think it would be best to move the NCAP_SEMI definitions into a scenario file, which will be included in the run only when you want to run the model with the MIP formulation.