Whenever you get exceptions, you should look at the error
description in your "error_log" object (in the Zope "Root Folder" of the ZMI).
There, you can see (in the so called traceback) where the exception
has been raised. This is invaluable information.

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Dieter

Thanks, another question

is possible have a general except and inside show what type is?
in dtml was
<dtml-try>
...
<dtml-except>
type:<dtml-var error_type> value: <dtml-var error_value>
</dtml-try>

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Lo bueno de vivir un dia mas
es saber que nos queda un dia menos de vida