Minor fix.

src/blenderbim/blenderbim/bim/module/profile/ui.py

@@ -16,15 +16,14 @@
 # You should have received a copy of the GNU General Public License
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
 
-from bpy.types import Panel, UIList
 import bpy
-
 import blenderbim.bim.helper
 import blenderbim.tool as tool
+from bpy.types import Panel, UIList
 from blenderbim.bim.module.profile.data import ProfileData
 from blenderbim.bim.module.profile.prop import generate_thumbnail_for_active_profile
 
-# Profile Manager Class
+
 class BIM_PT_profiles(Panel):
     bl_label = "IFC Profiles"
     bl_idname = "BIM_PT_profiles"
@@ -43,11 +42,10 @@ class BIM_PT_profiles(Panel):
             ProfileData.load()
         self.props = context.scene.BIMProfileProperties
 
-        if self.props.is_editing:
+        if self.props.is_editing and self.props.profiles and self.props.active_profile_index < len(self.props.profiles):
             preview_collection = ProfileData.preview_collection
             box = self.layout.box()
             profile_id = self.props.profiles[self.props.active_profile_index].ifc_definition_id
-
             profile_id_str = str(profile_id)
             if profile_id_str in preview_collection:
                 preview_image = preview_collection[profile_id_str]