E4688 Cmd Rej: LST=PRX if & only if APC uses PPC in route(dstn) table
The value specified for the proxy point code must be defined in the Destination table before the lst=prx parameter can be specified.
Recovery
Display the defined destinations. Enter the rtrv-dstn command.
Define the value specified for the proxy point code in the Destination table as necessary. Refer to the Database Administration - SS7 User's Guide for assistance.
Re-enter the ent-ls command that generated this error message.