GapFix Merge Fehler

[IB-Tool]

in line: ca. 2648

        if (lenpartlist + 1) == len(List_Parts_Fin):  # All parts are completed successfully

            IbTools = IbTool(Workspace)

            Merge_Dummy4 = PathCommonWorkspace + os.path.sep + 'IB_Tool_Results' + os.path.sep + "Merge_Dummy4.shp"

            print("vor gapfix")

            GapFix_out = IbTools.GapFix(Merge_Dummy4, Strassen)

            print("nach gapfix")

im „GapFix“:

in line: ca. 2172

            if Anz > 0:

                arcpy.management.Merge([InputRoadnetwork, ugb_line], rn_merge)

                arcpy.management.FeatureToPolygon(rn_merge, rn_merge_ply, None, "ATTRIBUTES", None)

                arcpy.AddField_management(rn_merge_ply, "Name", "TEXT")

                try:

                    arcpy.management.CalculateField(rn_merge_ply, "Name", "'RoBl_'+ str(!OID!)", "PYTHON_9.3", None)

                except:

                    pass

                arcpy.analysis.Split(ugb_symdiff_FL, rn_merge_ply, "Name", Workspace, None)

                MergeList = arcpy.ListFeatureClasses('RoBl_*')

                arcpy.management.Merge(MergeList, RoBl_Merge) // hier ist vlt. die MergeList leer?

                DelName(MergeList)

                rn_merge_ply_FL = arcpy.MakeFeatureLayer_management(rn_merge_ply)

                RoBl_Merge_FL = arcpy.MakeFeatureLayer_management(RoBl_Merge)

                sel = arcpy.management.SelectLayerByLocation(rn_merge_ply_FL, "WITHIN", RoBl_Merge_FL, None,

                                                             "NEW_SELECTION", "NOT_INVERT")

                arcpy.CopyFeatures_management(sel, RoBl_sel) // bzw. hier?

Die kleine Fehlermeldung lautet:

Fehler bei Ausführung. Parameter sind ungültig.

ERROR 000735: Eingabe-Datasets: Wert ist erforderlich

Fehler beim Ausführen von (Merge).

Die detaillierte Fehlermeldung erhalte ich durch einfügen kurz vor Ende des Scriptes durch:

    except Exception as e:

        print(str(e))

        Log("Alert", str(e))

        exc_type, exc_value, exc_traceback = sys.exc_info()

        print("General python error:")

        traceback.print_tb(exc_traceback, limit=1, file=sys.stdout)

        print("General python error (long):")

        traceback.print_exception(exc_type, exc_value, exc_traceback, limit=2, file=sys.stdout)

        time.sleep(3)

        input("Press key to exit.")

        sys.exit(-1)