question

Hello @DestructZero ,

This error is usually encountered when you try to update an airport but you don't have an airport element in your xml (and in the scenery editor).

In your case, you have duplicated the SimpleScenery example (SimpleAirport is what you should have duplicated for this), which does not contain an airport element, and that is why you see this error.

You should add an airport element to it.(See the documentation here).

Hope it helps,

Regards,
Boris

Thank you for your answer, I appreciate your time. I do have a question though. Since the airport I'm working on has already been created, selecting "SimpleAirport" would seem to imply that I want to create a new airport, which I don't want to do. If I want to add an element such as a Taxiway Sign to an airport, am I required to use SimpleAirport, and if I do that, am I required to rebuild the airport from scratch, or is it basically the same process as SimpleScenery, except in this case it's used to work with airports instead of scenery?

Thanks for the link - I will read the documentation now.

Adding a taxiway sign seems to need a taxiway in your project. To do this, you might better be served to use a program such as Airport Design Editor for MSFS, by Jon Masterson.

ADE MSFS 2020 base install

After installing, then install the most recent hotfix:

ADE 2020 Hotfix 5

ADE will decompile the stock MSFS airport, and recreate it's XML (within reason). It makes a copy of the airport that will over-ride the stock airport. ADE uses a 2-way edit creation that will give you a DevMode ready project of the airport. Most of the decompilation is based on code created by Patrick Germain.

ADE support forum

I think I have it now... so I can create a "new" airport over an existing airport area and kind of merge the two together. At least that's what I'm thinking. Thanks again for your help!

Rhumbaflappy... that's what I had intended to do, because I use ADE quite a bit. However, this airport was already created by someone else using ADE and I just wanted to change it. I don't have the source files but only the package, and when I tried to create my own and use both, MSFS seemed to have some problems with that.

As info (not that you implied, but others may read this) I wanted to do this as a personal project and I would never use someone else's creation to create my own and put it online, even as freeware... I just wanted to say that.

Thanks for the suggestion.

Thank you SO MUCH! I'll give that a try right away.

Those files are for KBPI which is an airport in Wyoming I think instead of KPBI (Palm Beach). I'm trying to recreate your process using your screen shot for KPBI but it keeps telling me that the ICAO for KPBI is already in use. I'm trying still... thanks for the work, I appreciate it.

I GOT IT, thanks to you! I had to make sure it loaded after the main mod loaded, but it works now. Thanks very much for your help, you made my day!