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TagExtraInfo doesn't work?????

 
tuancan
Greenhorn
Posts: 2
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My tag handler class:

I validate my "number" attribute as below:

This is my tag lib description:

My JSP for enter "number":

My JSP includes tag:

When I run it in JRun, it return only an error: 500 null
I tried to see my log file, it shows an exception:

When I try to run my tag lib in TomCat, it don't show that error. But when I try to enter characters, not number, it always return my value, it doesn't show any error for my validating. Pls help me. Thx a lot!
 
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