My requirement is like, I have to make sure that the user should upload only excel file before Submitting the form, if user try to upload any other file type it should through error message.
Thanks,
Kumar Sankalp
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What version of Appian are you on? 17.2 introduced the ability to add inline validation for this using the fv!files data. Check the docs for examples docs.appian.com/.../File_Upload_Component.html