Delete a Split Line Definition

You can delete a hole or other definition added with a split line but leave the closed polyline on the drawing:

Select the automatic floor.
Select Automatic Floors | Define Split.
Select the polyline.
Select Not a split line as the split line property.
Confirm by clicking OK.

Note:

Alternatively, you can delete the polyline, which also deletes the split line definition. Select the line and press the Delete key.
The object type of the split line is Split Lines.