**System Information**
OSX Yosemite: 10.10.3
NVIDIA GeForce GT 650M 1024 MB
**Blender Version**
Broken:2.74
**Short description of error**
So, I've been struggling with the FBX exporter for a while. I would get an empty 4kb file on export some of the time and not others, until I finally discovered the one variable that causes the empty file export.
If a mesh is not on the first layer when exporting a selected FBX it will save as a 4kb empty file with no mesh data, or anything for that matter. I've tested it in 2.73 and 2.74 and get the same results.