Okay, the problem with the plugin is that in line 175 of gf-excel-import/includes/import_records.js
you are only checking the File_Type if it is application/vnd.ms-excel
which is for MS Office 2003 version or file saved with .xls
extension.
For CVS files the mime type can be either text/csv
or application/csv
depending on the platform being used.
so I make some changes to fit into my need
if (
(File_Type == 'application/vnd.ms-excel') ||
(File_Type == 'application/csv') ||
(File_Type == 'text/csv') ||
(File_Type == 'application/wps-office.xls')
){ ....}
From the INSTALLATION guide, it was not stated clearly that the user needs to change the data column to field ID (maybe I missed it)
So for basic function, this plugin is good for what it does.