Errors in SNAP will result in failure of data to import. Errors can result from a number of factors; Columns dont match between .CSV and SNAP required columns, Part Numbers or data in topSHelf does not exist, More columns are expected that are contained in the CSV, Less columns are expected in the .CSV. When there are errors in the import, they will be displayed in Result section. Genereally there will be information pertaining to the error in that section containing line failure and type of error. Please note it and contact for assistance.