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Request Method: GET
Request URL: http://www.minenergia.gov.co/documents/10192/23915482/plan_estrategico_comunicaciones_2015_2016.pdf/3b49a15f-538d-4455-95ff-0959b40abd36
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.