Use the CONNAME parameter to identify your connection to the structure. CONNAME is required if the connection is to be persistent (CONDISP=KEEP) and optional if the connection is to be non-persistent (CONDISP=DELETE). However, if you do not specify a name when CONDISP=DELETE, the system generates a unique name for the connection. This field cannot be changed if the structure is rebuilt.

Note also that IXLCONN REBUILD will not be successful unless you specify the same connection name as for the original connect (either user-specified or system-generated).