Error item compiling

[gommi]

any idea how to fix it?

my compile log check say :

error: displacement found on a(n) func_detail entity - not supported (entity 132, brush 0)

error: displacement found on a(n) func_detail entity - not supported

but those rails and those arcs are not func detail and i've already "toWorld" em.
anyone know anything about it?

 

[Vel0city]

Those arcs aren't displacements, and so are the rails. Those are models. Use the in-Hammer problem checker Alt+P to let it point to the actual displacements, and then "toWorld" them.