toUpper (or not toUpper)?

[Mark Swindell]

I'm confused why this portion of a script refuses to run.  It runs  
fine from the message box.  Any ideas?

        put 4 into vUpperMe
        toupper(char vUpperMe of tText) -- it breaks here at toUpper

Error 573:      Handler: can't find handler
Hint :  repeat: error in statement
Error at        char 1 of line 29 in handler mouseUp
Code:   toupper


Thanks,
Mark

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