Anand pinged about this error in concurrent manager logs about Output Post Processor (FNDCOPP):
The Applications File Server could not open the file $APPLCSF/$APPLLOG/FNDCPGSC*txt for read
Starting FNDCPOPP Concurrent Manager : 16-MAY-2009 08:24:59
Found dead process: spid=(999999), cpid=(13200), Service Instance=(5271)
Metalink Note 331942.1 describes this issue. As per Oracle, it is an environment issue and running autoconfig corrects it.
However, we restarted the concurrent managers and it worked fine the second time. Root cause is not yet known.