Getting error when trying to upload in Workshop

[2OP | MadScientist]

Before starting to create a Sniper item, I tried making a basic trapezoid cylinder mesh, parent it to the weapon_0 bone and export it to DMX format. I chose the test.dmx and gave the default textures that came with the Sniper model. However, I am getting this log error:

Starting import...
Importing files...
Importing model: model_wearable
Copying from 'F:/sniper/Cylinder.dmx' to 'models/items/sniper/test/test.dmx'
==> 'e:\steam\steamapps\common\dota 2 beta\content\dota_addons\workshop_testbed\models\items\sniper\test\test.dmx'
Error: Nonexistent file: 'F:/sniper/Cylinder.dmx'

What does nonexistent mean? I want to know where I am going wrong before I even consider making complex models. I tried searching for it but maybe its something too simple that I might be overlooking. Screenshot and steps done upon request.