[xml] crash in charactersSAXFunc

[Adrian Feiguin <feiguin magnet fsu edu>]

 My program uses the SAX interface to parse an encoded image, lets say
that I'm using base64 encoding. 
 The charactersSAXFunc callback 
returns a string with all the character between tags, and I want to use 
it to reconstruct the original image. If the string
is too long (apparently len = 1000), my program crashes. 
 Can anybody tell me what's wrong? How can I overcome this?
Suggestions/advise, please?
Thanks!
<ADRIAN>