Hi RK,
Please share result for SQL query:
SQL>DBMS_STATS.UPGRADE_STAT_TABLE exec ('SYSTEM', 'STATTAB');
and re execute your command brspace -u / -f tbreorg -a lob2lob -o sapsr3 -s PSAPSR3 -t allsel -n PSAPSR3Z -c ctablob -lc medium -SCT .
Also once check SAP Note 1464091 - Minor functional enhancements in BR*Tools (3)
Thanks,
Gaurav