fix wrong object call

+PlotID/@dataPath/dataPath.m

@@ -59,7 +59,7 @@ classdef dataPath < handle
                 %checks if input is a valid DataPath object
                   tf = ~isfile(obj.DataPaths);
                   if any(tf)
-                     dataPath.throwError();
+                     obj.throwError();
                   end
             end
         end