scripts-blender/addons/brushstroke_tools/ops.py

@@ -103,6 +103,10 @@ class BSBST_OT_new_brushstrokes(bpy.types.Operator):
         surface_object = context_object if context.object in context.selected_objects else None
         flow_object = None
 
+        if not surface_object.data.uv_layers.active:
+            self.report({"ERROR"}, "Surface Object needs an available UV Map")
+            return {"CANCELLED"}
+
         name = 'Brushstrokes'
         brushstrokes_object = self.new_brushstrokes_object(context, name)
         flow_is_required = settings.brushstroke_method == 'SURFACE_FILL'