Logging FTP Business Service

I am having an issue with a file not being deleted from the FTP server and returning an error to this effect.  The file, however, was fully processed.  This causes the file to process again.  

My question is I seem to recall a flag that can be set to enable more detailed tracing to be done on the FTP service/adapter.  However, I have not been able to locate this.  Does anyone recall such a logging setting or was I just dreaming?