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Okay i got it thank you :)

int currentX, currentY, currentZ;
ListIterator<AbstractNodeLoc> middlePoint, endPoint;
AbstractNodeLoc locMiddle, locEnd;
boolean remove;
int pass = 0;
do
{
pass++;...

java.util.ConcurrentModificationException
at java.util.LinkedList$ListItr.checkForComodification(Unknown Source)
at java.util.LinkedList$ListItr.next(Unknown Source)
at...

I was using javolution before but my team decided to drop it. Since then we got a concurrentmodificationexception on
"LinkedList<AbstractNodeLoc> path = new LinkedList<>();" if i revert it to...