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Below are some examples of Warnings/errors Errors based around incorrect file locations referenced in the scene file
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Warning: (Mayatomr.Shader) : file1: referenced texture file "/incorect/texture/location/qube.jpg" doesn't exist, ignored
Cinema 4d
ERROR: Rendering failed: Asset missing
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After Effects
aerender Error: After Effects error: Unable to Render: File Not Found /incorrect/file/location/qube.mov
aerender version 11.0x378
These type of warnings mean that a texture/dependant file in this job could not be found
Commonly this is because the user has dependant files on there local machine machine IE: "C:\My Documents" or "/Users/USERNAME/Documents"