DSNE355A CHANGE DEFAULTS PROCESSING OPTION MUST BE Y (YES) OR N (NO)

Explanation
The user specified a change-default option other than 'YES', 'NO',
or the abbreviation 'Y' or 'N'. A valid user response determines
whether SPUFI displays the current-session SPUFI defaults and allows the
user to change the defaults.

System action
SPUFI waits until the user enters a valid response.

User response
Type in a 'Y' or an 'N', and press 'ENTER'.