Enable DCOM
DCOM might be disabled on the Meridian application server or client computers manually by IT personnel for security reasons or by a script (or group policy) or other software that is installed on the server or client computer.
Another cause of failed DCOM communications can be a software firewall on the server, including the integrated Windows firewall. Test this possibility by temporarily disabling the firewall and testing for the client error.
If access succeeds, configure the firewall to allow DCOM communication as described in Allow PowerWeb Access Through a Firewall.