REP-0004: Warning: Unable to open user preference file .

Error :- 

PPLLCSP Environment Variable set to :

 Current NLS_LANG and NLS_NUMERIC_CHARACTERS Environment Variables are :
AMERICAN_INDIA.UTF8

'.,'

Enter Password: 
REP-0004: Warning: Unable to open user preference file.

Report Builder: Release 10.1.2.3.0 - Production on Tue Jan 4 16:46:43 2011

Copyright (c) 1982, 2005, Oracle.  All rights reserved.




+---------------------------------------------------------------------------+
Executing request completion options...

+------------- 1) PUBLISH -------------+
Unable to find an Output Post Processor service to post-process request 8276455.

Check that the Output Post Processor service is running.
+--------------------------------------+

+------------- 2) PRINT   -------------+
Not printing the output of this request because post-processing failed.
+--------------------------------------+


Finished executing request completion options.

+---------------------------------------------------------------------------+
Concurrent request completed
Current system time is 04-JAN-2011 16:47:17

+---------------------------------------------------------------------------+

Solution:-

Please check the Display variables default

#export DISPLAY=our12-dev:1.0