This is a great list of Best Practices When Using Excel Files with ArcGIS.
In my experience, the problem is almost always to do with field names. Remove all characters, except alphanumeric and underscore. Field names must start with a letter. Keep field names short.
Signed in members can post, follow updates, and more. New here? Register a free account.
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.