I was using the Logic Gates demo and I notice that when a diagram is saved and then reopened that the number of the node counter starts from 0, and not from the highest numbered nodes in the opened diagram.

If the diagram is modified after opening and then the result is generated it can crash.

Just need to change it so that the counter variable is updated using the highest value from nodes tags in the opened diagram

I added this to the code I have used from the demo

            string[] s;
            int i=-1;
            counter = -1;
            foreach(DiagramNode node in diagram.Nodes)
            {
                s = node.Tag.ToString().Split('|');
                i = Convert.ToInt32(s[1]);
                if (i>counter)
                    counter=i;
            }
 


Thanks again for great product
Bill