Problem with TaskSequence

Hello,
I have created a tasksequence on Flow tab of a queue. It resembles Kitting Operation where operator will travel, collect emptycontainer, travel to location near bay/level of rack, select the required item, load & move to the container and then travel to destination queue.

Once the TaskSequence is created, its passed on to dispatcher and then on to forktruck. What happens is while forktruck is performing ts1, ts2 is dispatched to it. ts1 is aborted & going on to coordiantedtasks when ts2 is received. I am attaching snapshot of the model tree & code of ts that I created. I will try to create sample model and share.

Is this bug in Flexsim 7.7 & 2016? Or is something wrong in the code that I have written?

the code:
treenode dispatcher = centerobject(current,1); // the dispatcher or task executer

string KitName = getname(item);
int KitType = getitemtype(item);

treenode ts = createemptytasksequence(dispatcher,priority,preemp t);

inserttask(ts,TASKTYPE_TRAVEL,current,NULL); // Go to the InQueue
inserttask(ts,TASKTYPE_LOAD,item,current,port); // Load the Kit Pallet
for(int row = 1; row <= gettablerows("KitListDay1"); row++)
{
if ( KitName == gettablestr("KitListDay1",row,7))
{
// Travel to the Rack
string Loc = gettablestr("KitListDay1",row,6);
treenode To_Go_Loc = node(Loc,model());
inserttask(ts,TASKTYPE_TRAVEL,To_Go_Loc,NULL);
int bay = gettablenum("KitListDay1",row,4);
int level = gettablenum("KitListDay1",row,5);
string rackname = gettablestr("KitListDay1",row,3);
treenode rack = node(rackname,model());
int numContainers = rackgetbaycontent(rack, bay);
int ToCollectItemType = gettablenum("KitListDay1",row,2);
for(int numCont = 1;numCont<=numContainers;numCont++)
{

treenode Container = rackgetitembybaylevel(rack,bay,level,numCont);
if(objectexists(Container))
{
int SelectContianer = getitemtype(Container);
if(SelectContianer == ToCollectItemType)
{
treenode part = rank(Container,1);
if(objectexists(part))
{
inserttask(ts, TASKTYPE_LOAD,part,rack);
//inserttask(ts,TASKTYPE_MOVEOBJECT,part,item);
break;
}
else
{
moveobject(Container,node("ContainerREcycle", model()),0);
}
}
}

}

}
}
treenode FinishedKitDestination = node("QueueKitting",model());
inserttask(ts,TASKTYPE_TRAVEL,FinishedKitDestinati on); // Go to the OutQueue
inserttask(ts,TASKTYPE_UNLOAD,item,FinishedKitDest ination,0); // Unload the pallet

dispatchtasksequence(ts);
// return a 0 so this object will know that you made your own tasksequence and it doesn't need
//to make the standard tasksequence automatically
return 0;

This sounds like the ts2 is preempting ts1. So in your code you have this line:
treenode ts = createemptytasksequence(dispatcher,priority,preemp t);

what is the value of preempt? Is it taken from the object where this code is generated on and is that value not 0 by any chance?

I have kept Preempt value 0..

You didn't open the tasksequence in your screenshot of the tree so we couldn't see how it looks. But anyway, sending a small model would help us more.

Have you tried to step through your code where you create the tasksequence to check if there is nothing strange happening there?