It appears that if you click on the cell containing the file editor, click on the text (not the button), then click away, you will get "/mytext.abc/mytext.abc" as the file content where "/mytext.abc" is the cell data before you click on it.
Moreover, if you click on the button with a preexisting filename defined, you will find that the file editor construct the name wrongly, i.e. 'mytest.abc/mytext.abc
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Logged In: YES
user_id=783811
Originator: YES
Moreover, if you click on the button with a preexisting filename defined, you will find that the file editor construct the name wrongly, i.e. 'mytest.abc/mytext.abc