Db2 merge backup- issue

Hi ,

Please help on the isse which I was facing, while running db2ckbkp utility for merge backup image.

Image details :

Full backup :19.27 SAMPLE.0.advmon.NODE0000.CATN0000.20130405022952.0 01
Incremental Backup 8.27 SAMPLE.0.advmon.NODE0000.CATN0000.20130405023035.0 01
Merge Backup output: 27.50 SAMPLE.0.advmon.NODE0000.CATN0000.20130405023036.0 01


$ db2ckbkp -h SAMPLE.0.advmon.NODE0000.CATN0000.20130405023036.0 01

..
......
....

The proper image file name would be:
SAMPLE.0.advmon.NODE0000.CATN0000.20130405023036.0 01


[1] Buffers processed: #
Warning:Unknown object type found:36. Proceeding to next object.
#########

Image Verification Complete - ERRORS DETECTED: 1



Image verification is failed, with above mentioned error...

Can anyone faced such issues ? Please provide/suggest how to overcome this issue ?