https://community.appian.com/discussions/f/data/19567/read-excel-and-validate-and-cancel-uploadHi community, I have a a!fileUploadComponent(). A user can upload an excel file. Now if any of the rows of column &#39;A&#39; or column &#39;B&#39; is empty then the excel should not be uploaded. A validation message must be shown to the user. Please help me. Thanksen-USTelligent Community 12https://community.appian.com/thread/76480?ContentTypeID=1Tue, 15 Sep 2020 18:21:38 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:536045f9-a8ee-4cec-b03c-22b1183ca4bdMike Schmitt<p>This will not be possible without building it in such a way that the user submits the form between the file being uploaded and the validation being performed.&nbsp; The reason is that you can&#39;t do any operations on the uploaded file until it&#39;s been moved out of the temporary system-side folder where Appian stores all new uploads, in which we do not have permission to access documents or perform.</p> <p>The simple solution will be to make the user upload and then click a button/link to &quot;commit&quot; the upload where such actually causes the form to submit, run through validation node(s), and loop back to the task again.&nbsp; The user won&#39;t notice they&#39;ve left the task, but you&#39;ll be able to perform operations you need.&nbsp; If the file is invalid, you will need to manually delete it within the process subsequently.</p><div style="clear:both;"></div>