I read another thread (below) about this but what they're saying doesn't work for me.
http://www.adventuregamestudio.co.uk/yabb/index.php?topic=34787.0
When I use the Display function, which I'm sure I'm doing right, when I run the game and click on the item I get "Invalid GUI specified as text window". However the custom GUI window is set to 0, so where am I going wrong? I've done exactly what the tutorial shows but mine doesn't work.
Here's the format that I'm using:
Display("There is a door here.");
This usually happens if there are no GUIs at all.
Just create a new GUI, then test the game again.
That's great, thanks!