tools - cbtransfer fails to upgrade 1.8.1 sqlite db files into 2.0 couchstore files when data flag is non zero

test to upgrade 1.8.1 to build 1965 on windows.
On 1.8.1 setup, populate a few items to set flags as:
import mc_bin_client
client = mc_bin_client.MemcachedClient('localhost', 11211) #source
for i in range (5):
client.set("bin%d"%, 0, 100000+i, "hello world")

And i have the following errors during installation:

Copying C:\Users\ADMINI~1\AppData\Local\Temp\2\backup-11-26-2012-16-59-22\config
\config.dat
cp C:\Users\ADMINI~1\AppData\Local\Temp\2\backup-11-26-2012-16-59-22\config\
config.dat C:\t5\bin\install\..\..\var\lib\couchbase\config\config.dat
Ensuring bucket data directories.
Ensuring bucket data directory: c:/t5/var/lib/couchbase/data/default
mkdir -p c:/t5/var/lib/couchbase/data/default
Upgrading buckets.
Upgrading bucket: default
C:\t5\bin\install\..\cbtransfer.exe c:/t5/var/lib/couchbase/data/default-dat
a/default couchstore-files://c:/t5/var/lib/couchbase/data -b default --source-vb
ucket-state=active --destination-vbucket-state=active
cbdbupgrade pid: 3720
Exception in thread s0:] 0.0% (0/5 msgs)
Traceback (most recent call last):
File "threading.pyc", line 551, in __bootstrap_inner
File "threading.pyc", line 504, in run
File "pump_sfd.pyc", line 281, in run
error: integer out of range for 'I' format code