Hi, 

We have checked the cloud logs and this is the error we found: 'CPLEX 12.10' is outside the range set "AllSolvers" of element parameter "SolverSelection", see also option "warning range violation".

Please know that while uploading during the project verification initialization routines of the project are ran.

A best practice is selecting a solver in the procedure that is delegated, before the solve statement (not in MainInitialization). You can try doing it as shown below:

SolverSelection := last( indexSolvers | Findstring( formatString( "%e", indexSolvers  ), "CPLEX" ) );

Kind regards,

Dessie