Sketch text is not supported for thin features...?

Hello SW friends,

I am trying to extrude walls (think drywall) in a sketch.  When I use the "Extruded Boss" command, I receive the error message: "Sketch text is not available for thin features." when confirming (clicking the check mark) the feature.

The sketch I'm using is a 2D sketch imported as a new part from a .dwg file, that I assume to be the original CAD drawing of our building (or at-least a variation of it).

From what I can see, there is no text even in the sketch.

Anyone have any ideas?  File attached.  Using SW Standard 2017

Message was edited by: Denton Havemann

SolidworksParts And Features