Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
Unable to generate spec for `odoo-addon-l10n-es-vat-book'

Spec file can't be created by pyp2spec application for project odoo-addon-l10n-es-vat-book.