while running catupgrd.sql script getting below error .
SELECT version_script AS file_name FROM DUAL
*
ERROR at line 1:
ORA-20000: Upgrade not supported from version 10.2.0.1.0
ORA-06512: at "SYS.VERSION_SCRIPT", line 49
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options