Oracle Message EXP-00075 - rounding FILESIZE down, new value is string

ERRORrounding FILESIZE down, new value is string
CAUSEThe FILESIZE parameter must be a multiple of the RECORDLENGTH, but the value you specified for FILESIZE does not meet this requirement. The value of FILESIZE has been rounded down to be a multiple of the RECORDLENGTH used for the dump file.
ACTIONNo action is required. You can adjust the FILESIZE or RECORDLENGTH parameter to avoid this message. When importing this file, you must specify the FILESIZE value reported by this message.