What happened to my message box?

[Howard Bornstein]

Yikes! I've been working in LC 4.5.3 (that's the version I have an IOS
license for) and things were going fine. Suddenly, the msg box stopped
responding. No matter what I put into it, nothing is displayed and the stack
indicator shows RevErrorDisplay.

Scripts can write to the message box fine, but trying to work directly in
the message box is a no-go.

Restarting LC doesn't fix this. Does anyone have any ideas how to fix or
debug this?

TIA

-- 
Regards,

Howard Bornstein
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www.designeq.com