Hey Jon,
Just wanted to let you know that I found the problem, and it was not your fault. I forgot about the fact that I've bought a custom built computer with Windows 10 Pro installed. In the error message, it stated that it could not find part of the path. Well, the paths for the SDKs for both FSX and P3D were correct, and I knew they were. The path problem was where it says "Compile To. The path was set to what it was on my old previous computer. Now, it will compile. But, there's another problem. When I place the modified bgl in the scenery folder and load the simulator, all the scenery objects, such as the terminal, the control tower, and other buildings are gone and no longer show up in the sim. Here are 2 images:
The image below shows the original file and you can see that the terminal, the control tower, and other buildings are there.
The image below shows what it looks like after changing, only the location of the control tower. It was off by about 100 feet and the terminal and the other buildings are gone, and I've never changed them. By the way Tom, I also placed your bgl in the scenery folder and it gives the same exact problem.
The coordinates I've entered was correct and got it from google earth pro, using the older image. It's strange to me why they're not showing up now simply because I've changed the location of the control tower. Or it may be something else.
Would the format of the xml have anything to do with this?
Ken.