If the NSLOOKUP command was submitted in interactive mode, resubmit the command specifying a valid option after the SET subcommand. To accept the current options to the NSLOOKUP command, omit the SET subcommand. If the NSLOOKUP command was submitted from the user_id.NSLOOKUP.ENV data set, edit the data set, including a valid option after the SET subcommand to change the NSLOOKUP options, or deleting the SET subcommand to accept the current option settings. For more information about the SET subcommand, the options to the NSLOOKUP command, and the user_id.NSLOOKUP.ENV data set, see the z/OS Communications Server: IP User's Guide and Commands.