As I posted previously, existence for the file is checked before calling the redirect.
But you haven't shown what happens if the file doesn't exist. You haven't told us if there are any mechanisms on your system that might delete files.
All in all you told us little about your system (and most importantly, have shown us little actualy code), and haven't headed the advice to look into the access and error logs.
Asking general questions to solve a specific problem seems rather inefficient to me.
In reply to Re^7: Broken image link when calling CGI from img tag
by moritz
in thread Broken image link when calling CGI from img tag
by lintunen
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