Christosch88

Andreas, I suspect that the texture.cfg file must have the correct paths to get the appropriate base models for the aircraft depending on your version. Indeed, in my livery the texture.cfg points to the folder \Aerosoft A320-A321 Professional Base\ which is probably NOT present in defferent versions (e.g. X Extended etc.). I would recommend to make a backup copy of the texture.cfg file and then edit the one in the livery folder with a text editor (e.g. Notepad), to point to the base model folder of your version! Let me know if that helps!

Jim and Andreas, thank you for your comments. I use the A320 Professional version. This might be the reason. However, I highly doubt it because I have been installing numerous liveries that way, for very long time.