diff --git a/src/ifcpatch/ifcpatch/recipes/ExtractElements.py b/src/ifcpatch/ifcpatch/recipes/ExtractElements.py
index 19455793f3..d880def5ed 100644
--- a/src/ifcpatch/ifcpatch/recipes/ExtractElements.py
+++ b/src/ifcpatch/ifcpatch/recipes/ExtractElements.py
@@ -111,7 +111,7 @@ class Patcher(ifcpatch.BasePatcher):
         if element.is_a("IfcProject"):
             proj = self.new.add(element)
             for ctx in element.RepresentationContexts:
-                for coop in ctx.HasCoordinateOperation:
+                for coop in getattr(ctx, 'HasCoordinateOperation', ()):
                     self.new.add(coop)
             return proj
         return ifcopenshell.api.project.append_asset(