https://community.hpe.com/t5/operating-system-openvms/quot-unable-to-open-connection-to-agent-quot-error/m-p/3238017#M1569 Hi there<BR /><BR />Can anyone help me with the following error message that I recieve from one of my system while trying to connect to the other one.<BR /><BR /><BR />"error contacting agent node_name<BR />"error opening connectin on port 5601<BR />cps_client_handshake:error reading version from server<BR />"no bytes read from remote process while reading header<BR />"unable to open connection to agent<BR />"agent update failed"<BR /><BR />Regards Fri, 02 Apr 2004 06:59:02 GMT PatchAdmin 2004-04-02T06:59:02Z https://community.hpe.com/t5/operating-system-openvms/quot-unable-to-open-connection-to-agent-quot-error/m-p/3238017#M1569 Hi there<BR /><BR />Can anyone help me with the following error message that I recieve from one of my system while trying to connect to the other one.<BR /><BR /><BR />"error contacting agent node_name<BR />"error opening connectin on port 5601<BR />cps_client_handshake:error reading version from server<BR />"no bytes read from remote process while reading header<BR />"unable to open connection to agent<BR />"agent update failed"<BR /><BR />Regards Fri, 02 Apr 2004 06:59:02 GMT https://community.hpe.com/t5/operating-system-openvms/quot-unable-to-open-connection-to-agent-quot-error/m-p/3238017#M1569 PatchAdmin 2004-04-02T06:59:02Z https://community.hpe.com/t5/operating-system-openvms/quot-unable-to-open-connection-to-agent-quot-error/m-p/3238018#M1570 I suppose:<BR />Application on node1 tryes to send a message on Node2, port 5601.<BR /><BR />Possible causes:<BR />* Can Node2 be accessed from node1?<BR />* Does port 5601 on Node2 actually REACT?<BR /><BR />If the connection is TCP-based, you can check this by doing this from node1:<BR /><BR />$ TELNET node2 5601<BR /><BR />If this returns DIRECTLY with an error, check port 5601 on node2.<BR /><BR />If you have defined a service on node2 on port 5601, check these:<BR />* Has the service been enabled?<BR />* Is access allowed from node1?<BR />* Has the user actually has been defined in UAF for NETWORK ACCESS and has sufficient quota and privilige. Another problem I found once was that the account was expired....<BR />* Check accounting for this user (/PROCESS_TYPE=NETWORK/USER=<USER>). It may give you a clue on what's wrong.<BR />* Check this user's SYS$LOGIN (found in UAF). There should be a log file (unless you specified NOLOG on the service. If so, aenable logging!). If the logfile does not exists, check access!<BR />* the file you specified must exist in SYS$LOGIN of that user, but you can specify another location. However: beware that any logical (explicitly mentioned as well as implied) MUST be defined /SYSTEM (at least).<BR />* there shouldn't be any SET TERM/INQ in the SSYS$MANAGER:SYLOGIn.COM and LOGIN.COM of this user. This _could_ crash the service procedure.<BR /><BR />If it's a UDP based service, checks apply as well, but I'm not sure if ou could use telnet for checking.<BR />If a program on node2 is to listen to this port, there shlouldn't be a service defined at all on that port. Check logs of that program. <BR /><BR />Willem</USER> Fri, 02 Apr 2004 09:19:30 GMT https://community.hpe.com/t5/operating-system-openvms/quot-unable-to-open-connection-to-agent-quot-error/m-p/3238018#M1570 Willem Grooters 2004-04-02T09:19:30Z