Clone 11.5.10.2 error

I upgraded from 11.5.9 to 11.5.10 CU2 on
Linux 3ES last month.I planned to make a clone our instance.so i followed
Note:230672,When i am run the adpreclone i got the following error.Our RDBMS
version is 9.2.0.6 and i followed all steps in metalink regrading this error
but no hits.

RC-50409: Topology information required for cloning not found in the database.
Make sure that AutoConfig was run successfully prior to starting Rapid Clone,
and try again
Raised by oracle.apps.ad.tools.AdCreateCtlFile
RCdpreclone-50208: Exception in method gen_crctrfclone_sql
RC-50208: Exception in Constructor AdCreateCtlFile
Raised by oracle.apps.ad.tools.AdCreateCtlFile
RC-40001: Fatal: Failed to create sql script adcrdbclone.sql for recreating
control files at target

The log file shows the following error.

StackTrace:
java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:393)
at
oracle.apps.ad.tools.AdCreateCtlFile.get_rac_data(AdCreateCtlFile.java:1337)
at
oracle.apps.ad.tools.AdCreateCtlFile.gen_dbhomes_xml(AdCreateCtlFile.java:530)
at
oracle.apps.ad.tools.AdCreateCtlFile.gen_crctrfclone_sql(AdCreateCtlFile.java:626)
at oracle.apps.ad.tools.AdCreateCtlFile.(AdCreateCtlFile.java:428)
at oracle.apps.ad.clone.StageDatabase.doStage(StageDatabase.java:457)
at oracle.apps.ad.clone.StageDatabase.(StageDatabase.java:266)
at oracle.apps.ad.clone.StageDBTier.(StageDBTier.java:216)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at oracle.apps.ad.clone.util.CloneProcessor.run(CloneProcessor.java:68)
at java.lang.Thread.run(Thread.java:534)

Any help greatly appreciated

Thanks
senthil