Error "The publication '[Name]' does not exist." running sp_article_validation
Ensure you're on the 'publication' DB so USE [publicationDBName] and then execute the SP.

Otherwise, try various combinations such as the below for the NAME variable you're passing to the SP as an argument to the SP in case it's related to it not liking the preceding 'N which indicates that the subsequent string is in Unicode, thereby passing an NCHAR, NVARCHAR or NTEXT value, as opposed to CHAR, VARCHAR or TEXT.


SET @p = NAME 
SET @p = [NAME]