https://bugs.winehq.org/show_bug.cgi?id=57770
--- Comment #2 from Andrey Gusev andrey.goosev@gmail.com --- Right, they are in 'pdxmesh.shader' file in '../Hearts of Iron IV/glx/FX'
Also getting lines 'E5002: Can't implicitly convert from <error type> to float.' 'E5002: Can't implicitly convert from <error type> to float4.' 'E5002: Can't implicitly convert from <error type> to float4x4.'
so might be this is not just about identifier itself.