Cannot convert xva file

[mfechner]

I just create a xva file from a xenserver 6.2 untared it and execute:

python2 xenmigrate_new.py  -c Ref\:32/ test.img

Bit I get the error message:

xenmigrate 0.7.4 -- 2011.09.13
(c)2011 Jolokia Networks and Mark Pace -- jolokianetworks.com

convert ref dir   : Ref:32/
to raw file       : test.img
last file         : 40986
disk image size   : 40 GB

RW notification every: 1.0GB
Converting:
Traceback (most recent call last):
  File "xenmigrate_new.py", line 508, in <module>
    reftoraw(opts.convert,args[0],opts.gz)
  File "xenmigrate_new.py", line 358, in reftoraw
    source.close()
UnboundLocalError: local variable 'source' referenced before assignment