[Discuss-gnuradio] problem in nexecuting grc

[ahmad]

hello everybody
i have installed the latest uhd images and master branch for n210, (v
003_002_003-50-gff40f2d) after that, uhd_find_device and uhd_usrp_probe
functions properly, but the grc not executing and i received the following 
error:
Traceback (most recent call last):
  File "/home/ahmad/usrp_wbfm.py", line 193, in <module>
    tb=usrp_wbfm()
  File "/home/ahmad/usrp_wbfm.py", line 129, in_init_num_ channels=1,
  File "/usr/local/lib/python2.6/dist-packages/gnuradio/uhd/__init__.py" ,line
74, in constructor_intercepter return old constructor (*args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/gnuradio/uhd/uhd_swig.py", line
1856, in usrp_source (*args, **kwargs)
RuntimeError: TypeError: Cannot call get on wax obj base class

please help me how to solve this problem
thanks 
ahmad