Could you clarify where you encountered this file or if you are experiencing specific after interacting with it? The solid group is not solid - where to look for solution
If you were actually looking for a report on (as seen in tools like Solid Inspector 2 for SketchUp), please clarify, as the term "solid report" is frequently used in that technical context to describe fixing non-manifold geometry.
If you haven't opened it, delete it immediately and empty your trash.