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RFC_ERROR_COMMUNICATION: Connect to message server at jcon connections

Hi friends,

we are trying to configure JCo destinations for our WD application to connect to ECC6 system from NW04 J2EE engine. when we are trying to connect to this ECC system it is giving some strange error as below. We have checked the SLD settings like installation number, ECC system host, port number, logon group etc - and everything looks good. But still

facing the problem. Any help regarding this will be highly appreciated.

even ping also not working.

the error is

com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to message server host failed Connect_PM TYPE=B MSHOST=flag-projects GROUP=SPACE R3NAME=D50 MSSERV=sapmsD50 PCS=1 ERROR The message received isn't from a message server. Are you really connected to the message server? Please check your connection parameters. (flag-projects / sapmsD50) TIME Fri Sep 19 20:10:36 2008 RELEASE 700 COMPONENT MS (message handling interface, multithreaded) VERSION 4 RC -29 MODULE msxxi_mt.c LINE 2543 COUNTER 1

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