Is your file ready to render?
The single biggest reason for render failures on the render farm is due to improper setup.
This script will help you to check your file for common errors.
Open the script editor.
Open the script file (Link above and here)
Select the script file. Ensure that All Files or Python Files are filtered (not Mel)
Switch to the custom tab. Save the script to the shelf for easy use in the future. Give a name, and click the new icon to run the script.
The script will hopefully provide some insight that will help you to check if your file is ready to submit to the render farm or not.