When scheduled or manual Alteryx workflows try to overwrite or append the Tableau hyper extract file, it fails(File is locked by another process). This is because a Tableau workbook is using the hyper extract file. We know the behavior is expected as the file is opened by another user/process so Alteryx won't be able to modify it until the file is closed. Alteryx product team should consider this and implement it in the future to solve many problems.