in some customer cases it is possible, that normal endusers should been able to insert source files for Ascii Readers.
Well in most situations it is not possible for them to insert the file directly into the server, this because of missing permissions.
The attached Inspiration shows how to solve this request using Blob Cube.
To get the sample work on your environment you have to check the extract Procedure and the ASCII Reader for the Path where the files are located.
My sample is build up with "Standard" BOARD Folder on C drive.
You can also enlarge the attached source file with other lines of data. The ASCII Reader is build up in Append Mode, that you are able to insert new members.
Hope the inspirations helps a little in some cases.