Hi @skotian1289
1. Make sure file is not kept open by anyone.
2. Try closing the alteryx designer and opening the file. Does that work?
3. Try outputting again to different location with different file name and check.
Might not be exactly what you would like to hear but this happens especially when we are working with replace files, can you try dynamically writing a file everyday?
You can use a forumla tool to create the entire file path and use output tool to dynamically change the path and choose where to save or what name to save the file with.
Hope this helps!