FyroxEngine/Fyrox · error

Failed to revert property

Error message

Failed to revert property {path}. Reason: no such property!

What it means

Logged in fyrox-graph's revert_inheritable_property when applying the reverted (parent) value to the child property fails because the property could not be set — resolve_path_mut on the set operation returned Err, summarized as 'no such property'. Despite the message wording, this fires on the final set-by-path step after a successful resolution earlier, often due to mutability/type resolution failure on the same path.

Solutions

1. Re-resolve the path immediately before setting; don't cache paths across structural changes
2. Verify the node still contains the property at set time (no intervening removal)
3. Rebuild/re-save the scene with the current engine version
4. Log the underlying resolve error detail to distinguish 'not found' from 'not settable'

// resolve read-only first, then attempt the write only if it resolved
let mut ok = false;
node.resolve_path(path, &mut |r| ok = r.is_ok());
if !ok { return; }

match result {
    Ok(old_value) => { previous_value = Some(old_value); was_set = true; }
    Err(e) => Log::err(format!("revert {path} failed: {e:?}")),
}

When it happens

Trigger: The final set_field_by_path-style resolve fails: path was resolvable earlier but the setter path resolution failed (e.g. field inside a non-mutable context, or path refers to a property removed in between), typically after schema/version drift.

Common situations: Undo/revert operations in the Fyrox editor after engine upgrade, reverting properties on nodes whose composition changed (widget children added/removed), concurrent modification invalidating cached paths.

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

• Failed to resolve parent path
• Property is not inheritable!
• Failed to resolve child path
• Failed to set property
• Graphics context is uninitialized!

AI-assisted analysis of FyroxEngine/Fyrox@76c91aad8e (2026-09-10). Data as JSON: /api/errors/de53201e4c067c6f. Report an issue: GitHub.

Appendix: source

Thrown at fyrox-graph/src/lib.rs:597

                });

            // Try to apply it to the child.
            if need_revert {
                if let Some(parent_value) = parent_value {
                    let mut was_set = false;

                    let mut parent_value = Some(parent_value);

                    self.inner_mut().set_field_by_path(
                        path,
                        parent_value.take().unwrap(),
                        &mut |result| match result {
                            Ok(old_value) => {
                                previous_value = Some(old_value);

                                was_set = true;
                            }
                            Err(_) => Log::err(format!(
                                "Failed to revert property {path}. Reason: no such property!"
                            )),
                        },
                    );

                    if was_set {
                        // Reset modified flag.
                        reset_property_modified_flag(self.inner_mut(), path);
                    }
                }
            }
        }

        previous_value
    }

    /// Tries to downcast self to the specified type, or if it is not possible, tries to find a
    /// field of the specified type.

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