Minor fix.

src/blenderbim/blenderbim/bim/module/pset/data.py

@@ -71,7 +71,8 @@ class ObjectPsetsData(Data):
         if element.is_a("IfcTypeObject"):
             return
         element_type = ifcopenshell.util.element.get_type(element)
-        return cls.psetqtos(element_type)
+        if element_type:
+            return cls.psetqtos(element_type)
 
 
 class ObjectQtosData(Data):

src/blenderbim/blenderbim/bim/module/sequence/operator.py

@@ -656,13 +656,13 @@ class CopyTaskAttribute(bpy.types.Operator):
     bl_idname = "bim.copy_task_attribute"
     bl_label = "Copy Task Attribute"
     bl_options = {"REGISTER", "UNDO"}
-    data: bpy.props.StringProperty()
+    name: bpy.props.StringProperty()
 
     def execute(self, context):
         return IfcStore.execute_ifc_operator(self, context)
 
     def _execute(self, context):
-        data = json.loads(self.data)
+        value = context.scene.BIMWorkScheduleProperties.task_attributes.get(self.name).get_value()
         self.file = IfcStore.get_file()
         props = context.scene.BIMTaskTreeProperties
         for task in props.tasks:
@@ -670,10 +670,8 @@ class CopyTaskAttribute(bpy.types.Operator):
                 ifcopenshell.api.run(
                     "sequence.edit_task",
                     self.file,
-                    **{
-                        "task": self.file.by_id(task.ifc_definition_id),
-                        "attributes": {data["name"]: None if data["is_null"] else data["value"]},
-                    },
+                    task=self.file.by_id(task.ifc_definition_id),
+                    attributes={self.name: value},
                 )
         Data.load(IfcStore.get_file())
         bpy.ops.bim.load_task_properties()

src/blenderbim/test/bim/feature/sequence.feature

@@ -1,6 +1,34 @@
 @sequence
 Feature: Sequence
-    Covers Visualising Work Schedule Date Range.
+
+Scenario: Add work plan
+    Given an empty IFC project
+    When I press "bim.add_work_plan"
+    Then nothing happens
+
+Scenario: Enable editing task
+    Given an empty IFC project
+    And I press "bim.add_work_schedule"
+    And the variable "work_schedule" is "IfcStore.get_file().by_type('IfcWorkSchedule')[0].id()"
+    And I press "bim.enable_editing_tasks(work_schedule={work_schedule})"
+    And I press "bim.add_summary_task(work_schedule={work_schedule})"
+    And the variable "task" is "IfcStore.get_file().by_type('IfcTask')[0].id()"
+    When I press "bim.enable_editing_task(task={task})"
+    Then nothing happens
+
+Scenario: Copy task attribute
+    Given an empty IFC project
+    And I press "bim.add_work_schedule"
+    And the variable "work_schedule" is "IfcStore.get_file().by_type('IfcWorkSchedule')[0].id()"
+    And I press "bim.enable_editing_tasks(work_schedule={work_schedule})"
+    And I press "bim.add_summary_task(work_schedule={work_schedule})"
+    And I press "bim.add_summary_task(work_schedule={work_schedule})"
+    And the variable "task" is "IfcStore.get_file().by_type('IfcTask')[0].id()"
+    And I press "bim.enable_editing_task(task={task})"
+    And I set "scene.BIMWorkScheduleProperties.task_attributes[2].string_value" to "Foo"
+    When I set "scene.BIMTaskTreeProperties.tasks[1].is_selected" to "True"
+    And I press "bim.copy_task_attribute(name='Description')"
+    Then nothing happens
 
 Scenario: See the current frame date as text
     Given an empty IFC project

src/ifcopenshell-python/ifcopenshell/api/sequence/add_work_plan.py

@@ -19,9 +19,9 @@ class Usecase:
             name=self.settings["name"],
         )
         work_plan.CreationDate = ifcopenshell.util.date.datetime2ifc(datetime.now(), "IfcDateTime")
-        person = ifcopenshell.api.owner.settings.get_person(self.file)
-        if person:
-            work_plan.Creators = [person]
+        user = ifcopenshell.api.owner.settings.get_user(self.file)
+        if user:
+            work_plan.Creators = [user.ThePerson]
         work_plan.StartTime = ifcopenshell.util.date.datetime2ifc(self.settings["start_time"], "IfcDateTime")
 
         context = self.file.by_type("IfcContext")[0]