Cause . . . . . : Either the keyword on the extended parameter list was blank, or the keyword length parameter was found to have a value of zero. The keyword and its value are ignored. Recovery . . . : Ensure that the keywords specified on the command have between 1 and 30 characters and that keyword lengths have values between 1 and 30. If the results of the operation are unacceptable, correct the keyword error(s) and then try the request again.