Error When Saving as (.OBJ) and exporting [FIXED]

Hello,

I'm trying to save a file (.obj) format and I get this error:

-- ERROR: Bad Cast when try to get a class NZOM::CSubMesh but actual type is class NZOM::CVal


I also get the same error when I export (.obj)


I'm using latest version 2018.0.100


Is this a bug ?


Thanks in advance!