The default is 0. If there is no specific line type for the entity, it is assigned the default line type found in the DXF layer table in the header of the DXF file. If there is no layer table, DXF-TYPE will be blank. This value is taken from either group code 38 or the initial z valued from group code 30. Group code 38 exists only in AutoCAD DXF files prior to Release 11.
Elevation is a single value for the entire entity.
If the entity is a Point, Shape or Insert, this field will be blank. The values contained in these files represent the minimum and maximum coordinate values of the coverage feature extent. Then change the name back to the final name of the coverage. You will be prompted for the layer names and entities of each DXF layer to be processed. Enter each layer name only once.