Erro desconhecido no hibernate

502625 [AWT-EventQueue-0] ERROR hql.PARSER  -  Invalid path: 'fpgt.descricao'
502625 [AWT-EventQueue-0] ERROR hql.PARSER  - <AST>:0:0: unexpected end of subtree
502625 [AWT-EventQueue-0] ERROR hql.PARSER  -  left-hand operand of a binary operator was null
502625 [AWT-EventQueue-0] ERROR hql.PARSER  -  Invalid path: 'fpgt.descricao'
Exception occurred during event dispatching:
org.hibernate.hql.ast.QuerySyntaxException: Invalid path: 'fpgt.descricao' [from br.com.intersig.sistema.beans.CadFpgt as f where fpgt.descricao like '%ENTRADA%' order by fpgt.descricao]