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Join Date: Dec 2012
Location: Frosno, Ca
Default 01-05-2017, 07:13 PM

[QUOTE=BadWolfGeronimo;57459]Everytime I try to play my code, this error pops up after a few seconds. If it's not doing this then there is another error that makes the play screen black and I have to restart the app every time I need to play the program. My final is due tomorrow so of course this is perfect timing.

Error during simulation.

Throwable that caused the error:

edu.cmu.cs.stage3.alice.core.IllegalPropertyValueE xception: element must not be null.

Usually this is caused by an instruction trying to call something that has been deleted. look for the word "none" in an instruction in your movie. Like:

none move right 1 meter

none as a string

ground distance below none

or in an event like

let the mouse movenone

If you can't find anything like that try reloading one of the previously saved versions of the movie located in the "Backups of XXX" folder.


Mark Henwood
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