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

Problem

Concurrent requests completed with following warning.

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

Solution

To resolve the warning, copy the prefs.ora file from your Reports Builder $ORACLE_HOME/tools/admin/ directory into the Applications $HOME directory.

[appmgr@ebs ~]$ . /u01/PRD/apps/apps_st/appl/APPSPRD_ebs.env
[appmgr@ebs ~]$ cd $ORACLE_HOME/tools/admin
[appmgr@ebs admin]$ pwd
/u01/PRD/apps/tech_st/10.1.2/tools/admin
[appmgr@ebs admin]$ cp prefs.ora /home/appmgr

Reference :
R12: Request Logs Contain the Message "REP-0004: Warning: Unable to open user preference file" (Doc ID 1120529.1)