FyroxEngine/Fyrox · warning

Unable to create property editor instance: Reason

Error message

Unable to create property editor instance: Reason {e:?}

What it means

The Inspector builds one property editor widget per property of the inspected object. If creating the editor for a property fails (e.g. no editor definition is registered for the property's type), it falls back to a simple text placeholder and logs this error.

Solutions

1. Register a property editor definition for the property's type (implement/implement a custom editor via PropertyEditorDefinition)
2. Use a supported type or add a #[derive] attribute hint (e.g. value editors like number/text) the inspector understands
3. Read the `Reason` in the message to see exactly why the editor construction failed
4. As a stopgap, inspect the property manually or exclude it from the inspected object

Example fix

// before (no editor registered for MyType)
struct MyType { x: f32 }
// after: expose an editor-supported inner value instead
struct MyType { x: f32 } // register:
inspector.editors.register(MyType::type_uuid(), MyTypeEditorDefinition::default());

// Check editor support before inspecting:
// if inspector.editors.definition(MyType::type_uuid()).is_none() { register(...) }

When it happens

Trigger: Inspecting an object with a property whose type has no registered property editor definition; a custom editor definition returned Err from its constructor; type erased via reflection not matching any known editor.

Common situations: Adding a new struct/enum type to an inspected object without registering an editor for it; version upgrades where editor definitions moved or were removed; generic/newtype wrappers lacking editor support.

Understand the failure class

Background: 'Could not be found', 'does not exist', 'not found in database': the resource-not-found family when an ID, slug, key, or URI lookup comes back empty — this error's family across 20 libraries.

Related errors

• err.to_string()
• Cannot add window to split tile
• Cannot subtract window from split tile
• Implement me!
• Node column out of bounds

AI-assisted analysis of FyroxEngine/Fyrox@76c91aad8e (2026-09-10). Data as JSON: /api/errors/7073e3f178fc3786. Report an issue: GitHub.

Appendix: source

Thrown at fyrox-ui/src/inspector/mod.rs:1451

                                property_editor: editor,
                                property_value_type_id: definition.property_editor.value_type_id(),
                                property_editor_definition_container: definition_container.clone(),
                                property_name: info.name.to_string(),
                                property_display_name: info.display_name.to_string(),
                                property_tag: info.tag.to_string(),
                                property_debug_output: field_text.clone(),
                                property_container: container,
                                property_path,
                            });

                            if info.read_only {
                                ctx[editor].set_enabled(false);
                            }

                            container
                        }
                        Err(e) => {
                            Log::err(format!(
                                "Unable to create property editor instance: Reason {e:?}"
                            ));
                            make_simple_property_container(
                                create_header(ctx, info.display_name, 0.0, None, layer_index),
                                TextBuilder::new(WidgetBuilder::new().on_row(i).on_column(1))
                                    .with_wrap(WrapMode::Word)
                                    .with_vertical_text_alignment(VerticalAlignment::Center)
                                    .with_text(format!(
                                        "Unable to create property \
                                                    editor instance: Reason {e:?}"
                                    ))
                                    .build(ctx),
                                &description,
                                name_column_width,
                                false,
                                ctx,
                            )
                        }

View on GitHub (pinned to 76c91aad8e)