Hi, and thanks a lot for your reply,
please find below two of the errors I am getting:
1- dpsk_loopback.py example used and I got:
dpsk_loopback.py: cannot connect to X server
2- I used one of the modified codes that uses gr-ieee802.11 I got something like
File "/wifi_rx.py", line 79, in __init__
self.connect((self.ieee802_11_sync_short_0, 1), (self.blocks_delay_1, 0))
File "/root/gnuradio/lib/python2.7/dist-packages/gnuradio/gr/hier_block2.py", line 47, in wrapped
func(self, src, src_port, dst, dst_port)
File "/root/gnuradio/lib/python2.7/dist-packages/gnuradio/gr/hier_block2.py", line 110, in connect
self.primitive_connect(*args)
File "/root/gnuradio/lib/python2.7/dist-packages/gnuradio/gr/runtime_swig.py", line 5336, in primitive_connect
return _runtime_swig.top_block_sptr_primitive_connect(self, *args)
ValueError: port number 1 exceeds max of 0
thanks a lot for your help
amani