Symptom:
Installation fails with (where ...long-path... is the specified long installation path name):

<PRE>
        Successfully started '...long-path.../bin/cnrservagt' to initialize databases...
        The 'ccm' server failed to initialize the Network Registrar configuration databases !!! See ...long-path.../temp/ccm_upgrade_status_log for details.
        *** Installation Failed ? 1 ***
General installation error.  Please see '...long-path.../logs/install_cnr_log' for more details
</PRE>

And, there is no ccm_upgrade_status_log.

Viewing the agent_server_1_log shows that the server agent failed to start because it thought another server was running:

<PRE>
agent/server/1 Info System 0 08003 server agent exiting -- another agent is running?
</PRE>

Conditions:
The installation path is 80 or more characters long.