The name of the file into which accounting data is to be stored. If files are named using suffixes, then the name of the current file is the concatenation of acctngFileName and acctngFileNameSuffix. An agent will respond with an error (e.g., 'wrongValue') to a management set operation which attempts to modify the value of this object to the same value as already held by another instance of acctngFileName. An agent will also respond with an error (e.g., 'wrongValue') if the new value is invalid for use as a file name on the local file system (e.g., many file systems do not support white space embedded in file names). The value of this object can not be modified while the corresponding instance of acctngFileRowStatus is 'active'.