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Request Method: GET
Request URL: http://www.minenergia.gov.co/documents/10180/23400/01-PRESENTACION2010-2011.pdf/79530b58-3fb0-4af7-8525-77cd5efe3f45
Raised by: wagtail.documents.views.serve.serve

This document does not match the given filename.

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.