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error en el add-on 'alfresco form model manager'

Question asked by lazaro on Jan 15, 2013
Buenas,

me acabo de instalar el plugin http://code.google.com/p/alfresco-form-model-management/
y funciona  http://localhost/alfresco/wcs/form-builder/home
pero de ahí no pasa, me salta
Web Script Status 500 - Internal Error

The Web Script /alfresco/wcs/form-builder/model-manager has responded with a status of 500 - Internal Error.

500 Description:   An error inside the HTTP server which prevented it from fulfilling the request.

Message:   06170003 Wrapped Exception (with status template): 06170156 Failed to execute script 'classpath*:alfresco/templates/webscripts/ca/ab/fm/formsmanagement/model-manager/model-manager.get.js': 06170155 TypeError: Cannot read property "children" from null (file:/C:/Alfresco4.0a/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/templates/webscripts/ca/ab/fm/formsmanagement/model-manager/model-manager.get.js#16)
   
Exception:   org.mozilla.javascript.EcmaError - TypeError: Cannot read property "children" from null (file:/C:/Alfresco4.0a/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/templates/webscripts/ca/ab/fm/formsmanagement/model-manager/model-manager.get.js#16)

alguien puede darme una solución , estoy en win32 con alfresco 4.0

un saludo

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