diff --git a/src/blenderbim/blenderbim/bim/module/resource/data.py b/src/blenderbim/blenderbim/bim/module/resource/data.py
index 146bb7ce00..e70b29fb7a 100644
--- a/src/blenderbim/blenderbim/bim/module/resource/data.py
+++ b/src/blenderbim/blenderbim/bim/module/resource/data.py
@@ -95,7 +95,7 @@ class ResourceData:
         sum = 0
         nested_resources = ifcopenshell.util.resource.get_nested_resources(resource)
         for nested_resource in nested_resources or []:
-            if not nested_resource.Usage:
+            if not nested_resource.Usage or not nested_resource.Usage.ScheduleWork:
                 continue
             duration = ifcopenshell.util.date.ifc2datetime(nested_resource.Usage.ScheduleWork)
             sum += duration.total_seconds() / 3600
diff --git a/src/blenderbim/blenderbim/bim/module/resource/ui.py b/src/blenderbim/blenderbim/bim/module/resource/ui.py
index 9e7495db0f..7304bd25e6 100644
--- a/src/blenderbim/blenderbim/bim/module/resource/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/resource/ui.py
@@ -124,7 +124,7 @@ class BIM_PT_resources(Panel):
                 schedule_work = resource.get("ScheduleWork", None)
                 derived_schedule_work = resource.get("DerivedScheduleWork", None)
                 row1col2.label(
-                    text="{}".format(schedule_work) if schedule_work else "*{}".format(derived_schedule_work),
+                    text="{}".format(schedule_work) if schedule_work else "{} h*".format(derived_schedule_work),
                     icon="TIME",
                 )
 
diff --git a/src/blenderbim/blenderbim/tool/sequence.py b/src/blenderbim/blenderbim/tool/sequence.py
index e7f924b72f..97340431a0 100644
--- a/src/blenderbim/blenderbim/tool/sequence.py
+++ b/src/blenderbim/blenderbim/tool/sequence.py
@@ -489,15 +489,6 @@ class Sequence(blenderbim.core.tool.Sequence):
         is_deep = bpy.context.scene.BIMWorkScheduleProperties.show_nested_outputs
         return ifcopenshell.util.sequence.get_task_outputs(task, is_deep)
 
-    @classmethod
-    def get_task_resources(cls, task):
-        resources = []
-        for rel in task.OperatesOn:
-            for object in rel.RelatedObjects:
-                if object.is_a("IfcResource"):
-                    resources.append(object)
-        return resources
-
     @classmethod
     def enable_editing_work_calendar_times(cls, work_calendar):
         props = bpy.context.scene.BIMWorkCalendarProperties