3424314 - ERS instance does not start

The ERS instance does not start. Below errors are shown in the following trace files (that are located in the "work" directory of the ERS instance - “/usr/sap/<SID>/ERSxx/work").

dev_enrepsrv 

[Thr 139910247598976] Replication server start with instance number <SCSID set in instance profile>
[Thr 139910247598976] *** ERROR => RepIOConnector:constr.: NiHostToAddr for '' failed with rc -2 [enrepservio. 117]
[Thr 139910247598976] *** ERROR => RepServer: main: Cannot connect to enqueue server: RepIOConnector: cannot resolve hostname [enrepserv.cp 729]

stderr0 

(1794491) Starting local Command:
 Command:  er.sap<SID>_ERS<instance_number>
           pf=/usr/sap/<SID>/ERS<instance_number>/profile/<SID>_ERS<instance_number>_<hostname>
           NR=<SCSID set in instance profile>
er.sap<SID>_ERS<instance_number>=>sapparam(2): fopenU("/usr/sap/<SID>/ERS<instance_number>/profile/<SID>_ERS<instance_number>_<hostname>"  ","r"): No such file or directory
Cannot connect to enqueue server: RepIOConnector: cannot resolve hostname

• SAP NetWeaver based product
• ABAP Platform based product

Enqueue Replication Server, enserver, enrepserver, fail, ERS not working, High Availability, failover, replication, enque, doesn't,cannot start,_PF,DIR_PROFILE , KBA , BC-CST-EQ , Enqueue , Problem