Application defaults module name at start
You can use the DECP option of the START DB2 command to specify the application defaults module that is loaded at Db2 startup.
Important: If your Db2 environment
has a dependency on the name DSNHDECP, you should not include the
DECP option. Tools from an independent software vendor, or your own
applications might have a dependency on this module name. For example,
if a CAF or RRSAF application does an implicit identify or connect
operation, the module with the name DSNHDECP is used.