Unable to add multiple knowledge bases to Most Useful OOB functionIssue In KBPortalServiceImpl script include , trying to customize most useful articles method but since it is using OOB script include (SNC.KnowledgeHelper().getMostUsefulArticles) we don't have access. Provide more information on thatResolutionFunction "getMostUsefulArticles" is an internal Java function and not available to be used in custom script includes.You might want to use some different approach to design your solution.