Originally posted by: Pierre-LucPigeon

Hy,

I'm trying to solve a problem and at the and of the solving, I have this error : "IloCP internal error: cannot replay solution".

 ! ----------------------------------------------------------------------------
 ! Minimization problem - 1255 variables, 239 constraints
 ! LogPeriod            = 100000
 ! Workers              = 1
 ! TimeLimit            = 1
 ! RestartGrowthFactor  = 1
 ! Initial process time : 0.01s (0.00s extraction + 0.01s propagation)
 !  . Log search space  : 2235.3 (before), 2194.3 (after)
 !  . Memory usage      : 6.0 MB (before), 6.5 MB (after)
 ! Using sequential search.
 ! ----------------------------------------------------------------------------
 !          Best Branches  Non-fixed            Branch decision
 *       4288524     4785 0.18s                      -
IloCP internal error: cannot replay solution

I manage to identify that the problem come from the combination of an IloCumulFunctionExpr and an optional interval. If I make the interval present or I remove the cumul function, I don't have the problem.

Because of confidentiality concern, I cannot display the C++ code of the model in this forum.

I would like to know if this error come from an error in my model or from an error of ILOG.

Thanks

Originally posted by: PhilippeLaborie

At first sight, it looks like an error in the CP Optimizer engine.

Which version are you using? 12.6.0 ?

Could you export the model as a .cpo file and attach it? 

Originally posted by: Pierre-LucPigeon

I'm using the 12.6.0 version.

The problem seems to be with the intervals Ret_i_208 (Ret_1_208, Ret_2_208, ...)

Originally posted by: PhilippeLaborie

It seems like a bug in 12.6. I can reproduce it in 12.6.3, but not in the latest release 12.7.

We are investigating and will keep you up to date.

Thanks for reporting the problem.