Just to let you know, when testing FileManagerLib, I found an tiny issue:
use AppleScript version "2.4" use framework "Foundation" use scripting additions use FMLib : script "fileManagerLib" set aFileOrPath to "~/Desktop/testFile.rtf" -- edited after Yvan's comment set folderOrPath to "~/Desktop/testFolder4" FMLib's copyItem:aFileOrPath uniquelyToFolder:folderOrPath
The result was an error because the destination folder was misspelled (It should be testFolder).
But the error returned was: The file “testFile” does not exists.
Every handler that uses copyFromURL or moveFromURL has the same behavior.