Originally posted by: kendong

hi,

I am trying to run the following code but I get the error "inboundtrain","outboundtrian" which are element immutable. the set cannot be iterated in more than 2 loops??

thanks.

int PlanMonth = ...;
int PlanDay = ...;

//Inbound Trians Information
tuple nInboundTrians
{
  string TrianID;
  float ArrivalMonth;
  float ArrivalDay;
  float ArrivalHour;
  float ArrivalMinute;
  float InspectionTime;
  float RailcarNum;
  float HumpTime;
  float ArrivalTime;
}
{nInboundTrians} inboundtrain = ...;

//Blocks Information
tuple nBlocks
{
  string BlockID;
  string InboundTrainID;
  int RailcarNum;
  string OutboundTrainID;
  float DwellTime;
  float ArrivalTime;
}
{nBlocks} block = ...;

//Outbound Trians Information
tuple nOutboundTrians
{
  string TrianID;
  float DepartureMonth;
  float DepartureDay;
  float DepartureHour;
  float DepartureMinute;
  float InspectionTime;
  float AssembleTime;
  float DepartureTime;
  string BlockID1;
  string BlockID2;
  string BlockID3;
  string BlockID4;
  string BlockID5;
  string BlockID6;
}
{nOutboundTrians} outboundtrain = ...;

execute INITIALIZE {
   
  //Calculate the arrival time and deparutre time
  for(i in inboundtrain)
   i.ArrivalTime = ((i.ArrivalMonth - PlanMonth) * 30 + (i.ArrivalDay - PlanDay)) * 1440
        + i.ArrivalHour * 60 + i.ArrivalMinute;
         
  for(j in outboundtrain)
   j.DepartureTime = ((j.DepartureMonth - PlanMonth) * 30 + (j.DepartureDay - PlanDay)) * 1440
        + j.DepartureHour * 60 + j.DepartureMinute;
   
     
  //set arrival time of each block
  for(u in block)
   for(i in inboundtrain)
    if(u.InboundTrainID == i.TrianID)
     u.ArrivalTime = i.ArrivalTime;
  }

Hi

you get an error because you try to modify i in

for(i in inboundtrain)
   i.ArrivalTime = ((i.ArrivalMonth - PlanMonth) * 30 + (i.ArrivalDay - PlanDay)) * 1440
        + i.ArrivalHour * 60 + i.ArrivalMinute;

and i as the index is immutable.

What you could write instead:

for(var k=0;k<=inboundtrain.size;k++)

Opl.item(inboundtrain,k).ArrivalTime= ((Opl.item(inboundtrain,k).ArrivalMonth - PlanMonth) * 30 + (Opl.item(inboundtrain,k).ArrivalDay - PlanDay)) * 1440
        + Opl.item(inboundtrain,k).ArrivalHour * 60 + Opl.item(inboundtrain,k).ArrivalMinute;

regards

Originally posted by: kendong

It works, thank you so much!