In Odoo development, you may encounter an error message like the one below:

raise ValueError('External ID not found in the system: %s' % xmlid)
ValueError: External ID not found in the system: 

Upon inspecting your code, you may find that the necessary code is correctly implemented, leading to confusion about the cause of this error. This issue often arises when referencing an external ID of a view within a view file, but the definition of this external view is written after the reference. Consequently, the system is unable to locate it, indicating a problem with order precedence. To ensure smooth execution, it's crucial to place the code defining the references above the code block where these references are used.