Hi Joe,
Many thanks for your reply. I have tried both of the approaches you suggested; the first gives me this error:
Uncaught TypeError: Cannot read property 'getSymbol' of null
The second throws no error, but there is no change(in other words the stop("Touch") command is not executed.
I have put my test files (very simple) here:
Would appreciate any light you can throw.
Thanks again,
Tim