How can I fan out to individual features in a GDB based on the "LAYER" attribute found in my data?

The fanout option would be used to create multiple gdbs named per the LAYER field. To create feature classes based on the LAYER field: In your writer parameters, set the Feature Class or Table Name parameter to 'LAYER'.

So I do this and I get the error: Geodatabase Writer: Feature Type Definition 'Traffic Separation Scheme Boundary' was requested, but not defined

To me, it is reading in the "feature_type" which in this case is "Traffic Separation Scheme Boundary" and trying to Write based on "LAYER" which has a different value then "Traffic Separation Scheme Boundary". Can I force my reader to read in features based on "LAYER"?

I want to read in everything from the GDB, dynamically I believe, I dont want 600 separate feature class readers coming in, then I want to fanout my current feature classes based on the "LAYER" field. When I attempt this I get that error. This seems extremely easy and I am probably missing one or 2 clicks/settings.

@sjolster31​ FME is trying to create a layer called "Traffic Separation Scheme Boundary" but there is no schema to tell it what to create. You need to link the "Traffic Separation Scheme Boundary" to the source feature - probably using fme_feature_type. The Dynamic Workflows tutorial describes some of this. Probably in the section Destination Schema Contains Different Feature Type