I'm assuming by "incomplete path" you mean the path is not closed.
If you select all, and temporarily apply a fill and stroke to each/all ; any shapes that are not filled and do not have the stroke completely around the fill, are not closed paths....visually see which do not meet your fill/stroke colors; those are incomplete/open paths. Select those and fix them.
If unsure, make a test layer with closed and open paths and see/test the above method.
If you have many many paths, this may be too tedious.
A path need not be closed to be part of a compound path. Something you have selected is not a path, such as a symbol or a raster image.