Destroy Event for object obj_timeline

[r3nacraft 3]

___________________________________________
############################################################################################
FATAL ERROR in
action number 1
of Destroy Event
for object obj_timeline:

ds_list_find_index argument 1 incorrect type (undefined) expecting a Number (YYGI32)
############################################################################################
--------------------------------------------------------------------------------------------
called from - gml_Script_ds_list_delete_value (line 4)
called from - gml_Script_tl_event_destroy (line 7)
called from - gml_Object_obj_timeline_Destroy_0 (line 0)
called from - gml_Script_temp_event_destroy (line 34)
called from - gml_Object_obj_template_Destroy_0 (line 0)
called from - gml_Script_action_lib_remove (line 93)
called from - gml_Script_tab_properties_library (line 30)
called from - gml_Script_panel_draw_content (line 73)
called from - gml_Script_panel_draw (line 98)
called from - gml_Script_panel_area_draw (line 59)
called from - gml_Script_window_draw (line 14)
called from - gml_Script_app_event_draw (line 7)
called from - gml_Object_app_Draw_0 (line 0)