if i don't disable the 'raised root cosine filter' then i get this error in the op25 properties box: Sink - bb(0): Port has too many connections. i already had to disable the 'wx gui fft sink' to get rid of the "AttributeError: 'gr_hier_block2_sptr' object has no attribute 'set_callback'" error which i believe stops the op25 python gui from running. has anyone else had to deal with this "too many connections" error? thanks guys!