BSYR318E Invalid Value - Enter a value of "Y" to enter a new Target Pool selection, enter a "U" to
update the Target Pool selection, a value of "N" indicates that a Target Pool selection does not
exist.
Explanation
An invalid value was entered for the Target Pool field. If a
target pool already exists, this value will be set to Y.
User response
Correct the value as described in the message text.