diff --git a/src/blenderbim/blenderbim/bim/module/system/data.py b/src/blenderbim/blenderbim/bim/module/system/data.py
index a1c8665e7e..9a37c1f48d 100644
--- a/src/blenderbim/blenderbim/bim/module/system/data.py
+++ b/src/blenderbim/blenderbim/bim/module/system/data.py
@@ -126,8 +126,8 @@ class PortData:
             "total_ports": cls.total_ports(),
             "located_ports_data": cls.located_ports_data(),
             "is_port": is_port,
-            "port_connected_object": cls.port_connected_object() if is_port else None,
-            "port_relating_object": cls.port_relating_object() if is_port else None,
+            "port_connected_object_name": cls.port_connected_object_name() if is_port else None,
+            "port_relating_object_name": cls.port_relating_object_name() if is_port else None,
         }
         # AFTER located_ports_data
         cls.data["selected_objects_flow_direction"] = cls.selected_objects_flow_direction() if not is_port else None
@@ -142,16 +142,16 @@ class PortData:
         return cls.element and cls.element.is_a("IfcDistributionPort")
 
     @classmethod
-    def port_relating_object(cls):
-        return tool.Ifc.get_object(tool.System.get_port_relating_element(cls.element))
+    def port_relating_object_name(cls):
+        return tool.Ifc.get_object(tool.System.get_port_relating_element(cls.element)).name
 
     @classmethod
-    def port_connected_object(cls):
+    def port_connected_object_name(cls):
         connected_port = tool.System.get_connected_port(cls.element)
         if not connected_port:
             return
         connected_element = tool.System.get_port_relating_element(connected_port)
-        return tool.Ifc.get_object(connected_element)
+        return tool.Ifc.get_object(connected_element).name
 
     @classmethod
     def located_ports_data(cls):
@@ -159,19 +159,23 @@ class PortData:
 
         data = []
         for port in ports:
-            port_obj = tool.Ifc.get_object(port)
+            # port may be not present as a scene object
+            port_obj_name = getattr(tool.Ifc.get_object(port), "name", None)
             connected_port = tool.System.get_connected_port(port)
             if connected_port:
-                connected_obj = tool.Ifc.get_object(tool.System.get_port_relating_element(connected_port))
+                connected_obj_name = tool.Ifc.get_object(tool.System.get_port_relating_element(connected_port)).name
             else:
-                connected_obj = None
+                connected_obj_name = None
 
-            data.append((port, port_obj, connected_obj))
+            data.append((port, port_obj_name, connected_obj_name))
         return data
 
     @classmethod
     def selected_objects_flow_direction(cls):
-        for port, port_obj, connected_obj in cls.data["located_ports_data"]:
+        for port, _, connected_obj_name in cls.data["located_ports_data"]:
+            if connected_obj_name is None:
+                continue
+            connected_obj = bpy.data.objects[connected_obj_name]
             if connected_obj in bpy.context.selected_objects:
                 return port.FlowDirection
 
diff --git a/src/blenderbim/blenderbim/bim/module/system/ui.py b/src/blenderbim/blenderbim/bim/module/system/ui.py
index 063a28c4ee..d4a9bf9d5e 100644
--- a/src/blenderbim/blenderbim/bim/module/system/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/system/ui.py
@@ -177,23 +177,24 @@ class BIM_PT_ports(Panel):
         cols = [row.column(align=True) for i in range(6)]
 
         for i, port_data in enumerate(PortData.data["located_ports_data"]):
-            port, port_obj, connected_obj = port_data
+            port, port_obj_name, connected_obj_name = port_data
             flow_direction_icon = FLOW_DIRECTION_TO_ICON[port.FlowDirection or "NOTDEFINED"]
-            if port_obj:
+            if port_obj_name:
                 cols[0].label(text="", icon=flow_direction_icon)
                 cols[1].operator("bim.select_entity", text="", icon="RESTRICT_SELECT_OFF").ifc_id = port.id()
-                cols[2].label(text=port_obj.name)
+                cols[2].label(text=port_obj_name)
             else:
                 cols[0].label(text="", icon=flow_direction_icon)
                 cols[1].label(text="", icon="HIDE_ON")
                 cols[2].label(text="Port is hidden")
 
-            if connected_obj:
+            if connected_obj_name:
+                connected_obj = bpy.data.objects[connected_obj_name]
                 cols[3].operator("bim.disconnect_port", text="", icon="UNLINKED").element_id = port.id()
                 cols[4].operator(
                     "bim.select_entity", text="", icon="RESTRICT_SELECT_OFF"
                 ).ifc_id = connected_obj.BIMObjectProperties.ifc_definition_id
-                cols[5].label(text=f"{connected_obj.name}")
+                cols[5].label(text=connected_obj_name)
             else:
                 cols[3].label(text="", icon="UNLINKED")
                 cols[4].label(text="", icon="BLANK1")
@@ -243,19 +244,21 @@ class BIM_PT_port(Panel):
 
         # port located on
         row = layout.row(align=True)
-        relating_object = PortData.data["port_relating_object"]
+        relating_object_name = PortData.data["port_relating_object_name"]
+        relating_object = bpy.data.objects[relating_object_name]
         row.label(text="Port located on:")
-        row.label(text=relating_object.name)
+        row.label(text=relating_object_name)
         row.operator(
             "bim.select_entity", text="", icon="RESTRICT_SELECT_OFF"
         ).ifc_id = relating_object.BIMObjectProperties.ifc_definition_id
 
         # object connected to the port
         row = layout.row(align=True)
-        connected_object = PortData.data["port_connected_object"]
-        if connected_object:
+        connected_object_name = PortData.data["port_connected_object_name"]
+        if connected_object_name:
+            connected_object = bpy.data.objects[connected_object_name]
             row.label(text="Port connected to:")
-            row.label(text=connected_object.name)
+            row.label(text=connected_object_name)
             row.operator(
                 "bim.select_entity", text="", icon="RESTRICT_SELECT_OFF"
             ).ifc_id = connected_object.BIMObjectProperties.ifc_definition_id