The error REP-0001: Unable to find the Report Builder message file occurs when the Oracle Reports environment cannot locate the necessary message files (typically .msb or .msg files) required to display error and status information. This is almost always caused by incorrect environment variables or missing file permissions. Common Solutions
ls -la $ORACLE_HOME/reports/mesg
ORACLE_HOME and REPORTS_PATH are set correctly.without first creating a Reports tool component and a Reports server component. Validate DISPLAY Variable (Unix/AIX) The error REP-0001: Unable to find the Report