Error Message:

Option name is ambiguous.

Explanation:

The specified option can be confused with other options.

User Action:

Type enough letters of the option so that it is unambiguous. If the command has two options that both begin with /OPT, such as /OPT and /OPTION, you must type at least four letters to designate the second option. To see a list of options for this command, type NET HELP <command>.