I am also interested in the possibility of creating a pure CSV file without an XML header.
Could you provide an example of the existing file you get and a file you need?
This is just what i need.
I also found ExtExternalTools and tried to use it.
I created a new entry (add), gave it a name (Create CSV), and specified the location of the exe file. Arguments = {ItemFileName}, which is probably the channel name. Working directory is the storage location of the EXE file.
The whole thing is saved and uploaded.
Now it should be possible to create an entry in the project tree somewhere, e.g. in Views.
This is how the mask for ExtExternalTools is filled in
https://imgur.com/a/DXsXmlT
Presumably I still have to enter this in Views? But how?
https://imgur.com/a/Q7LXkuR