Oracle Message SQL*Loader-00101 - Invalid argument for username/password

ERRORInvalid argument for username/password
CAUSEThe username/password argument specified on the command line was not recognized. Another argument (not identified by a keyword) could be in the position where username/password is expected.
ACTIONCheck the format of the username/password argument, which is the first argument on the command line, if arguments are given without keywords.