The map "^0" cannot be found. This map was not imported. 

The object "^0" has a box projection mapping, which is not currently supported during import. This object's shading was not imported. 

While trying to import shading only, the object "^0" was found to have two or more pieces with different mapping parameters.  The mapping type was changed to parametric, and the shading was imported.

The object "^0" has multiple mapping parameters for one or more channels.  The first set of parameters was used.

While trying to import shading only, the object "^0" was found not to be an instance. This object was not imported.

While trying to import shading only, the object "^0" could not be found in the hierarchy.  It was probably moved in the hierarchy, deleted or renamed. This object was not imported.