Join Meshes Improvements, better error handling

functions/join_meshes.py

@@ -18,32 +18,46 @@ class JoinAllMeshes(Operator):
         return armature is not None and is_valid_armature(armature)
 
     def execute(self, context: Context) -> Set[str]:
+        try:
             self.join_all_meshes(context)
             return {'FINISHED'}
+        except Exception as e:
+            self.report({'ERROR'}, f"{t('Optimization.join_error')}: {str(e)}")
+            return {'CANCELLED'}
 
     def join_all_meshes(self, context: Context) -> None:
         if not select_current_armature(context):
-            self.report({'WARNING'}, t("Optimization.no_armature_selected"))
+            raise ValueError(t("Optimization.no_armature_selected"))
-            return
 
         armature = get_selected_armature(context)
         bpy.ops.object.mode_set(mode='OBJECT')
         bpy.ops.object.select_all(action='DESELECT')
 
         meshes: List[Object] = get_all_meshes(context)
+        if not meshes:
+            raise ValueError(t("Optimization.no_meshes_found"))
+
         for mesh in meshes:
             mesh.select_set(True)
 
         if bpy.context.selected_objects:
             bpy.context.view_layer.objects.active = bpy.context.selected_objects[0]
+            try:
                 bpy.ops.object.join()
+            except RuntimeError as e:
+                raise RuntimeError(f"{t('Optimization.join_operation_failed')}: {str(e)}")
+
+            try:
                 bpy.ops.object.transform_apply(location=True, rotation=True, scale=True)
+            except RuntimeError as e:
+                raise RuntimeError(f"{t('Optimization.transform_apply_failed')}: {str(e)}")
+
             fix_uv_coordinates(context)
             bpy.ops.object.mode_set(mode='OBJECT')
             bpy.ops.object.select_all(action='DESELECT')
             self.report({'INFO'}, t("Optimization.meshes_joined"))
         else:
-            self.report({'WARNING'}, t("Optimization.no_mesh_selected"))
+            raise ValueError(t("Optimization.no_mesh_selected"))
 
         context.view_layer.objects.active = armature
 
@@ -59,15 +73,18 @@ class JoinSelectedMeshes(Operator):
         return context.mode == 'OBJECT' and len([obj for obj in context.selected_objects if obj.type == 'MESH']) > 1
 
     def execute(self, context: Context) -> Set[str]:
+        try:
             self.join_selected_meshes(context)
             return {'FINISHED'}
+        except Exception as e:
+            self.report({'ERROR'}, f"{t('Optimization.join_error')}: {str(e)}")
+            return {'CANCELLED'}
 
     def join_selected_meshes(self, context: Context) -> None:
         selected_objects: List[Object] = [obj for obj in bpy.context.selected_objects if obj.type == 'MESH']
 
         if len(selected_objects) < 2:
-            self.report({'WARNING'}, t("Optimization.select_at_least_two_meshes"))
+            raise ValueError(t("Optimization.select_at_least_two_meshes"))
-            return
 
         bpy.ops.object.mode_set(mode='OBJECT')
         bpy.ops.object.select_all(action='DESELECT')
@@ -77,11 +94,20 @@ class JoinSelectedMeshes(Operator):
 
         if bpy.context.selected_objects:
             bpy.context.view_layer.objects.active = bpy.context.selected_objects[0]
+            try:
                 bpy.ops.object.join()
+            except RuntimeError as e:
+                raise RuntimeError(f"{t('Optimization.join_operation_failed')}: {str(e)}")
+
+            try:
                 bpy.ops.object.transform_apply(location=True, rotation=True, scale=True)
+            except RuntimeError as e:
+                raise RuntimeError(f"{t('Optimization.transform_apply_failed')}: {str(e)}")
+
             fix_uv_coordinates(context)
             bpy.ops.object.mode_set(mode='OBJECT')
             bpy.ops.object.select_all(action='DESELECT')
             self.report({'INFO'}, t("Optimization.selected_meshes_joined"))
         else:
-            self.report({'WARNING'}, t("Optimization.no_mesh_selected"))
+            raise ValueError(t("Optimization.no_mesh_selected"))
+

resources/translations/en_US.json

@@ -53,6 +53,9 @@
     "Optimization.remove_doubles_completed": "Remove doubles operation completed",
     "Optimization.select_armature": "Please select an armature",
     "Optimization.material_attribute_mismatch": "Attribute mismatch in material {material_name}, skipping",
+    "Optimization.join_error": "Error during mesh joining",
+    "Optimization.join_operation_failed": "Join operation failed",
+    "Optimization.transform_apply_failed": "Transform apply failed",
     "Tools.select_armature": "Please select an armature",
     "Tools.label": "Tools",
     "Tools.tools_title.label": "Tools:",