Switching Kepware servers in PCO

Hi Experts,
We have Kepware on a different machine and PCO on another machine. To connect the Kepware server we installed 'OPCCoreComponentsRedistributable(x86)' on the machine where PCO is installed. we were able to create a source system using the details of the kepware server. For some testing we are trying to re-point the PCO to another Kepware server. For configuring the other Kepware server, we made the changes to the 'opc_remote' file to specify the details of the other kepware server. After making the changes to the file, we re-started the server on which PCO is installed. After re-starting when i am trying to create a source system using the details of the new kepware server, i get message 'No OPC servers found on the specified machine'.
If i specify the other Kepware server that was provided earlier, i am still able to create the source system.
I know that we can connect to only one Kepware server from PCO, but is it that we cannot switch from one Kepware server to another.
We are on PCO 2.3 SP04 P7 and Kepware server is V4.190.341 - U.
Regards,
Darshan Sheth

Darshan,
For DCOM to work with PCo and Kepware, you have 2 options to configure the user access:
1. Allow full DCOM access for domain users that are members of the server Administrators group, EVERYONE, SYSTEM and NETWORK, and allow PCo and Kepware services to run under LocalSystem account (some network admins will not allow this as it opens potential network security holes)
2. Define named users or named Domain Group permissions for DCOM.
2.1. Use the named user or users that are members of the named Domain Group for the following:
    - named user for Kepware server_runtime service
    - named user for PCo Agent Instances
    - administrative user to log into to PCo remote Desktop
Avoid hosting PCo and remote OPC Servers on different Domains or on Workgroups -- should always be in the same Domain.
I strongly recommend that you migrate to Kepware V5 and investigate using the Kepware OPC UA interface along with PCo OPC UA Agent where you are going to have remote OPC Server requirements, and avoid the DCOM issues altogether.
Installing Kepware on PCo server, or PCo on the Kepware server will remove any DCOM configuration requirements.
Regards, Steve

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We're running WL Server 6.1 SP 2 on Solaris 2.8.          >
          > For the Apache HTTP proxy plugin, if you use the WebLogicCluster http.conf
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          >

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