Got below error while trying to combine snapshot files.
vmkfstools -i AXTST167-000001.vmdk /vmfs/volumes/datastore1/axtstbundled/AXTST167.vmdk
Destination disk format: VMFS zeroedthick
Failed to open 'AXTST167-000001.vmdk': Invalid argument (1441801).
vmkfstools -i /vmfs/volumes/datastore1/axtst167/AXTST167-000001.vmdk -d thin /vmfs/volumes/datastore1/axtstbundled/AXTST167_NEWW.vmdk
Destination disk format: VMFS thin-provisioned
Failed to open '/vmfs/volumes/datastore1/axtst167/AXTST167-000001.vmdk': Invalid argument (1441801).