I tried to create a graph dialog system but I have problems. When I save and then load the graph, even if the nodes appear, the texts inside or the sprites and fonts no longer appear when loaded (before then after load).
Could be a number of things. The data might not be getting written to disk, or an issue with whatever is drawing this node.
Is your this your own tool or an off the shelf tool? If its your own tool, you should be able to debug this yourself. If it has been made by someone else, you could contact the developer.