From 892b28205456c3e8e132f6f854c956491c2d8cab Mon Sep 17 00:00:00 2001
From: Sigma Dimensions <79010126+myoualid@users.noreply.github.com>
Date: Tue, 21 Feb 2023 20:23:07 +0100
Subject: [PATCH] Fix loading task properties when calendar doesn't have a
 name, ref issue #2783

---
 src/blenderbim/blenderbim/tool/sequence.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/blenderbim/blenderbim/tool/sequence.py b/src/blenderbim/blenderbim/tool/sequence.py
index 2c6b8cb929..b0d12c6c07 100644
--- a/src/blenderbim/blenderbim/tool/sequence.py
+++ b/src/blenderbim/blenderbim/tool/sequence.py
@@ -207,10 +207,10 @@ class Sequence(blenderbim.core.tool.Sequence):
             if task.HasAssignments:
                 for rel in task.HasAssignments:
                     if rel.is_a("IfcRelAssignsToControl") and rel.RelatingControl.is_a("IfcWorkCalendar"):
-                        item.calendar = calendar.Name if calendar else ""
+                        item.calendar = calendar.Name or "Unnamed" if calendar else ""
             else:
                 item.calendar = ""
-                item.derived_calendar = calendar.Name if calendar else ""
+                item.derived_calendar = calendar.Name or "Unnamed" if calendar else ""
 
             if task.TaskTime:
                 task_time = task.TaskTime