I assumed from the update notes that this command would have your bot write to chat the text contained in the requested .txt file.
For example
@readfile@[testfile.txt]
testfile.txt has 1 line and reads :
test
However, entering this command doesn't seem to do anything. The bot doesn't respond (or crash) and adds no text in chat.
In this case, testfile.txt is in the default location (\custom logs\)