From 4cf6d65e1a27ed860b957d69a41cfadcd747257e Mon Sep 17 00:00:00 2001
From: Andrej730 <azhilenkov@gmail.com>
Date: Mon, 16 Oct 2023 15:24:02 +0500
Subject: [PATCH] Fixed issue after 19345ff

It wasn't considering that EnumerationReference could be None
---
 src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py b/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py
index 44aa512ab3..c17079dffc 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py
@@ -69,7 +69,7 @@ class Usecase:
                     continue
                 if prop.is_a("IfcPropertyEnumeratedValue"):
                     enumeration = prop.EnumerationReference
-                    if self.file.get_total_inverses(enumeration) == 1:
+                    if enumeration and self.file.get_total_inverses(enumeration) == 1:
                         self.file.remove(enumeration)
                 self.file.remove(prop)
             self.file.remove(self.settings["pset"])