> ## Documentation Index
> Fetch the complete documentation index at: https://helix-claude-document-return-objects-rxi6v.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# E105

# Invalid Identifier

This error occurs when you use an invalid identifier in your HelixQL query.

## Erroneous Code Example

This error occurs when you use an invalid identifier in your HelixQL query.
For example, `Out` is a reserved keyword so it cannot be used as a variable or a parameter name.

<CodeGroup>
  ```helixql example_1.hx theme={null}
  QUERY getUser(id: ID) =>
      Out <- N<User>(id)
      RETURN Out
  ```

  ```helixql example_2.hx theme={null}
  QUERY getUser(Out: ID) =>
      user <- N<User>(Out)
      RETURN user
  ```
</CodeGroup>

## Solution

Rename the variable or parameter to a valid identifier.

<CodeGroup>
  ```helixql example_1.hx theme={null}
  QUERY getUser(id: ID) =>
      user <- N<User>(id)
      RETURN user
  ```

  ```helixql example_2.hx theme={null}
  QUERY getUser(id: ID) =>
      user <- N<User>(id)
      RETURN user
  ```
</CodeGroup>