List files in directory with no files

[Feeeeela]

When I try to list folders in a directory where are no folders it gives inform(null). I understand it means none folders were found – so there should be some handling of “No files/folders founs”. But I cannot continue with the conversation since then.

Hi! I am Troy, your office secretary.
list all folders

The file is aaa.
go aaa

list all files

The file is yyy and .DS_Store.
list all folders

Inform(null)
list all files