jaws script error

Hi, um, what does it mean when it says "Jaws sscript error,yes, or no"
I only get this when a friend sends me a e mail, and no other time, will I get 
this note.
I usually just escape and it goes away.
hope this is a valid question?
thanks for any help

'All that I have seen teaches me to trust God for all I have not seen.'

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