EM Ops center uninstallation failed

When I tried to uninstall Ops center,it failed.

1. Stop  the Agent Controller.

root@itqe-t5-2-2-zn1:/opt/SUNWxvmoc/bin#  ./agentadm stop
agentadm: Version 12.2.2.1103 launched with args: stop
 
Validating step : config_sysconfig stop    
Validating step : uce_agent stop    
Validating step : scn_agent stop    
scn_agent Common Agent Container environment is OK 
Validating step : setup_hmp stop    
Validating step : sc_console stop    
Validating step : workarounds stop    
End of validation 

executing step : config_sysconfig 

executing step : uce_agent 

executing step : scn_agent 
scn_agent Common Agent Container environment is OK 
Executing forced stop on scn-agent instance. 
Instance name not found: [scn-agent]. 
Cannot stop Common Agent Container instance "scn-agent".