diff --git a/src/ifcpatch/ifcpatch/recipes/ReplaceDrawingPath.py b/src/ifcpatch/ifcpatch/recipes/ReplaceDrawingPath.py
index e65a41acbd..b9cc90b9c6 100644
--- a/src/ifcpatch/ifcpatch/recipes/ReplaceDrawingPath.py
+++ b/src/ifcpatch/ifcpatch/recipes/ReplaceDrawingPath.py
@@ -16,6 +16,8 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with IfcPatch.  If not, see <http://www.gnu.org/licenses/>.
 
+import os
+from sys import platform
 
 class Patcher:
     def __init__(self, src, file, logger):
@@ -25,7 +27,9 @@ class Patcher:
         drawig in linux.
         In this case, blenderbim would tell you that can't load "stylesheet" or "markers" or "symbols" or "patterns" folder.
         If this happens, this recipie comes in rescue!
-        Basically, as the path is stored in a strig, the recipie replace the existing sep char with the right one.
+        Basically, as the path is stored in a string, the recipie replace the existing sep char with the right one.
+        It doesn't need to specify the ifc output file or any arguments.
+        If ifc ouput file is specified, it saves the patched file in the new file.
 
         Example:
 
@@ -48,76 +52,15 @@ class Patcher:
                 psets = ifcopenshell.util.element.get_psets(annotation)
                 pset = psets['EPset_Drawing']
                 pset_ifc = self.file.by_id(pset['id'])
+                wrong_sep = ""
+                if platform == 'linux' or platform == 'linux2' or platform == 'darwin':
+                    wrong_sep = "\\"
+                if platform == 'win32':
+                    wrong_sep = "/"
                 ifcopenshell.api.run("pset.edit_pset", self.file, pset = pset_ifc, properties = {
-                    'Stylesheet' : pset['Stylesheet'].replace('\\', '/'),
-                    'Markers' : pset['Markers'].replace('\\', '/'),
-                    'Symbols' : pset['Symbols'].replace('\\', '/'),
-                    'Patterns' : pset['Patterns'].replace('\\', '/'),
+                    'Stylesheet' : pset['Stylesheet'].replace(wrong_sep, os.path.sep),
+                    'Markers' : pset['Markers'].replace(wrong_sep, os.path.sep),
+                    'Symbols' : pset['Symbols'].replace(wrong_sep, os.path.sep),
+                    'Patterns' : pset['Patterns'].replace(wrong_sep, os.path.sep),
                 })
 
-
-
-#class Patcher:
-#    def __init__(self, src, file, logger, output_dir=None):
-#        """Split an IFC model into multiple models based on building storey
-#
-#        The new IFC model names will be named after the storey name in the
-#        format of {i}-{name}.ifc, where {i} is an ascending number starting from
-#        0 and {name} is the name of the storey.
-#
-#        :param output_dir: Specifies an output directory where the new IFC models will be saved.
-#        :type output_dir: str
-#
-#        Example:
-#
-#        .. code:: python
-#
-#            ifcpatch.execute({"input": model, "recipe": "SplitByBuildingStorey", "arguments": ["C:/.../output_files"]})
-#        """
-#        self.src = src
-#        self.file = file
-#        self.logger = logger
-#        self.output_dir = output_dir
-#
-#
-#    def patch(self):
-#        import ifcopenshell
-#        from shutil import copyfile
-#
-#        storeys = self.file.by_type("IfcBuildingStorey")
-#        for i, storey in enumerate(storeys):
-#            dest = "{}-{}.ifc".format(i, storey.Name) if self.output_dir == None else "{}/{}-{}.ifc".format(self.output_dir,i, storey.Name)
-#            copyfile(self.src, dest)
-#            old_ifc = ifcopenshell.open(dest)
-#            new_ifc = ifcopenshell.file(schema=self.file.schema)
-#            if self.file.schema == "IFC2X3":
-#                elements = old_ifc.by_type("IfcProject") + old_ifc.by_type("IfcProduct")
-#            else:
-#                elements = old_ifc.by_type("IfcContext") + old_ifc.by_type("IfcProduct")
-#            inverse_elements = []
-#            for element in elements:
-#                if element.is_a("IfcElement") and not self.is_in_storey(element, storey):
-#                    element.Representation = None
-#                    continue
-#                if element.is_a("IfcElement"):
-#                    styled_rep_items = [
-#                        i for i in old_ifc.traverse(element) if i.is_a("IfcRepresentationItem") and i.StyledByItem
-#                    ]
-#                    [new_ifc.add(i.StyledByItem[0]) for i in styled_rep_items]
-#                new_ifc.add(element)
-#                inverse_elements.extend(old_ifc.get_inverse(element))
-#            for inverse_element in inverse_elements:
-#                new_ifc.add(inverse_element)
-#            for element in new_ifc.by_type("IfcElement"):
-#                if not self.is_in_storey(element, storey):
-#                    new_ifc.remove(element)
-#            new_ifc.write(dest)
-#
-#    def is_in_storey(self, element, storey):
-#        return (
-#            element.ContainedInStructure
-#            and element.ContainedInStructure[0].RelatingStructure.is_a("IfcBuildingStorey")
-#            and element.ContainedInStructure[0].RelatingStructure.GlobalId == storey.GlobalId
-#        )
-
-