diff --git a/src/ifcopenshell-python/ifcopenshell/util/system.py b/src/ifcopenshell-python/ifcopenshell/util/system.py
index 51ee9e001b..208979e584 100644
--- a/src/ifcopenshell-python/ifcopenshell/util/system.py
+++ b/src/ifcopenshell-python/ifcopenshell/util/system.py
@@ -83,31 +83,34 @@ def get_connected_port(port):
 
 
 def get_connected_to(element):
-    from blenderbim.bim.ifc import IfcStore
-    ifcSchema = IfcStore.get_file().schema
     results = []
-    if ifcSchema == "IFC4":
-        for port in ifcopenshell.util.system.get_ports(element):
-            for relConnectsPort in port.ConnectedTo:
-                for relNest in relConnectsPort.RelatedPort.Nests:
-                    results.extend(relNest.RelatingObject)
-    elif ifcSchema == "IFC2X3":
-        for port in element.HasPorts:
-            for relConnectsPort in port.RelatingPort.ConnectedTo:
-                results.extend([r.RelatedElement for r in relConnectsPort.RelatedPort.ContainedIn if r.RelatedElement != element])
-    return results
+    for port in ifcopenshell.util.system.get_ports(element):
+        for relConnectsPort in port.ConnectedTo:
+            for disPort in [relConnectsPort.RelatedPort,relConnectsPort.RelatingPort]:
+                if hasattr(disPort,"Nests"):
+                    for relNest in disPort.Nests:
+                        if relNest.RelatingObject != element:
+                            results.append(relNest.RelatingObject)
+                # IFC2X3 only, deprecated in IFC4
+                elif hasattr(disPort,"ContainedIn"):
+                    for relConPortToElement in disPort.ContainedIn:
+                        if relConPortToElement.RelatedElement != element:
+                            results.append(relConPortToElement.RelatedElement)
+    return(results)
+
 
 def get_connected_from(element):
-    from blenderbim.bim.ifc import IfcStore
-    ifcSchema = IfcStore.get_file().schema
     results = []
-    if ifcSchema == "IFC4":
-        for port in ifcopenshell.util.system.get_ports(element):
-            for relConnectsPort in port.ConnectedFrom:
-                for relNest in relConnectsPort.RelatedPort.Nests:
-                    results.extend(relNest.RelatingObject)
-    elif ifcSchema == "IFC2X3":
-        for port in element.HasPorts:
-            for relConnectsPort in port.RelatingPort.ConnectedFrom:
-                results.extend([r.RelatedElement for r in relConnectsPort.RelatingPort.ContainedIn if r.RelatedElement != element])
-    return results
\ No newline at end of file
+    for port in ifcopenshell.util.system.get_ports(element):
+        for relConnectsPort in port.ConnectedFrom:
+            for disPort in [relConnectsPort.RelatedPort,relConnectsPort.RelatingPort]:
+                if hasattr(disPort,"Nests"):
+                    for relNest in disPort.Nests:
+                        if relNest.RelatingObject != element:
+                            results.append(relNest.RelatingObject)
+                # IFC2X3 only, deprecated in IFC4
+                elif hasattr(disPort,"ContainedIn"):
+                    for relConPortToElement in disPort.ContainedIn:
+                        if relConPortToElement.RelatedElement != element:
+                            results.append(relConPortToElement.RelatedElement)
+    return(results)
\ No newline at end of file