What has happened to my graphs? Graphs gone blank

[Terje]

I have a large application with many indicators, controllers and graphs. Suddenly, all my graphs went blank as shown in the attached picture. Not showing the graph it self, the grid or the numbers along the axis. All new graphs I try to create in this VI have the same problem. If I copy the graph and past it in a new VI then it works fine. So, apparently, it is a problem with the VI. I tried to delete everything except the graph, but the behavior is still there. I have attached this VI. What can I do to get my graphs back? 

The application was made with LabView 8.5

[jcarmody]

I've found the problem!  Your block diagram is empty.

[Terje]

You misunderstood my question.

Yes it is empty, but if you try to send anything to it you won’t see anything.

I have not connected anything to it because the problem is more serious than that. The graph doesn’t show the grid or the numbers along the axis. And that is even before anything is connected to it. Even if you try to add a completely new graph to this VI, it comes up with the same problem. Attached is an image of how the graph should look like.