Bug wiht GUIs

[BlackBaron]

For some extrange reason that I can't figure out, after I load a saved game and I try to turn on my GUI number 9, I get the following error:

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Adventure Game Studio
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An error has occured. Please contact the game author for support, as this
problem is caused by the game rather than the interpreter.
(ACI version 2.60.693)

(Global script line 525)
Error: IsGUIOn: invalid GUI number specified

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Aceptar  
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just as if it didn't exist anymore.
It's wierd, because BEFORE I load a game, I can turn that GUI on without any problems.

Thanks for your help.

[BlackBaron]

Never mind, I found out the error.

I'm so embarrassed I made such a stupid mistake.
It was the DUMBEST thing  

The saved game I was loading was from a previous version of my game, where that GUI didn't exist!