Workflow and Special Objects

Hello the list,
 I'm using Zope 2.8.8-final, python 2.3.5 and ZMS 2.8.1-a19.
 As describe yesterday I have a problem with my installation : I don't 
understand an error message.
 The error message is :
*Error Type: NameError*
*Error Value: global name 'eNotFound' is not defined

 Well the error message comes when I activate the workflow. In this 
case, when I go in a special object, I receive the above message. Do I 
have to do something special with the instances of my special objects 
before or after to activate the workflow?
 Nobody has the same problem?

Best regards.
Jean Tinguely Awais.

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fn:Jean Tinguely Awais
n:Tinguely Awais;Jean
org:Artification AG;Web
adr:;;Hubelweg 5;Herzogenbuchsee;;3360;Switzerland
email;internet:[email protected]
title:Associate
tel;work:062/961.07.07
url:http://www.artification.com
version:2.1
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