check if handler exist before using it

Thierry 00bioarchimed at
Fri Nov 9 15:35:14 EST 2007

Hi Phil,

Excellent !

For my own interest, is this written somewhere in the Doc ?

So, slowly may be I could manage what I want :-)

Thanks to all of you for your time !


> Those numbers follow the pattern Revolution uses to describe an  
> error it encountered. If that is the case, then one of the numbers  
> in each line is the line number of an error description in the  
> cErrorsList of cd 1 of stack "revErrorDisplay". The other numbers  
> are the line number of the bad line within the problem script, and  
> char number where the bad reference starts within the problem line  
> of code.

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