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REP-50600 or REP-51002: Bind To Reports Server Failed and Exception 50125: "Network is unreachable" With Multicast (Doc ID 577958.1)

Last updated on JANUARY 20, 2021

Applies to:

Oracle Reports Developer - Version and later
Information in this document applies to any platform.


Reports Server 10g R2 (10.1.2.X) or 11g

There is just one NIC (networking card) setup in this box

nslookup <hostname.domain> is working fine

HTTP listener is working: http://host:7778

Trying to execute a simple url like getserverinfo, showjobs or a simple test.rdf report displays REP-51002 in the web browser:

Exception 51002 (): Bind to Reports Server <rep_server_name> failed

or per rwserver.trc:

Error 50600 (RWServer:startServer) 

or per rwserver.log:

*** 2011/2/24 8:52:58:131 -- Broadcasting is disabled. Please enable cosnaming for Reports discovery.

Per rwservlet.trc in 10g or rwservlet_diagnostic.log in 11g, there is a "Network is unreachable" error message before generic REP-51002:

Exception 50125 ( Network is unreachable
at Method)
at oracle.reports.comm.Multicast.send(
at oracle.reports.comm.Multicast.send(
at oracle.reports.comm.NetworkUtility.getIOR(
at oracle.reports.comm.NetworkUtility.getIOR(
at oracle.reports.server.RWServer.startServer(
): Internal error Network is unreachable
Exception 51002 (): Bind to Reports Server rep_apps_oracleas1 failed
oracle.reports.RWException: IDL:oracle/reports/RWException:1.0
at oracle.reports.utility.Utility.newRWException(



[2011/2/24 8:52:54:974] Info 50103 (ServerPacketHandler:start): ServerPacketHandler started successfully
[2011/2/24 8:52:54:985] Info 50103 (RWServer:startServer): Using multicast mechanism
[2011/2/24 8:52:58:131] Error 50600 (RWServer:startServer): Broadcasting is disabled. Please enable cosnaming for Reports discovery.
[2011/2/24 8:52:58:144] Exception 50600 (): Broadcasting is disabled. Please enable cosnaming for Reports discovery.
oracle.reports.RWException: IDL:oracle/reports/RWException:1.0

Per -findAll, broadcast mechanism (multicast) is used to locate servers, and it is displaying REP-50503 because the in-process reports server is not recognized:



Brand new installation of 10.1.2.X or 11g release.
The midtier software has been installed in two different ORACLE_HOMES  in the same machine and both fail with same REP-51002 or Error 50600 error message.


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In this Document
 Additional Information
 - Release 10gR2 (10.1.2.X)
 - Release 11g (11.1.1.X)

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