DSNL304I THE ALIAS `alias-name` ALREADY EXISTS.

Explanation
The MODIFY DDF command was issued to add an ALIAS
but the requested alias name already exists and the alias cannot be
added.
alias-name

The name of the location alias.

System action
The command is not processed.

User response
Specify an alias that does not already exist.
You can use the output from DISPLAY DDF command to see the list of
aliases that are currently defined. 

DSNL304I THE ALIAS alias-name ALREADY EXISTS.

Explanation

System action

User response

DSNL304I THE ALIAS `alias-name` ALREADY EXISTS.