(I would have sent this as a comment on the issue tracker, but creating an account didn't seem to give me permission to comment.)
I've been using GNU Radio (strictly via Python) and met what seems to be the already-reported issue <http://gnuradio.org/redmine/issues/520>, where a hier_block2 will misbehave after calling disconnect_all(). Specifically, according to the exceptions seen from Python, it forgets that it has any inputs or outputs and rejects attempts to connect to them; for example, "output port 0 out of range for throttle(2)" resulting from self.connect(throttle, self). I took a look at the code, and I found this suspicious bit in hier_block2_detail.cc: void hier_block2_detail::disconnect_all() { d_fg->clear(); d_blocks.clear(); d_inputs.clear(); d_outputs.clear(); } I have very little C++ experience, but if I understand correctly, the last two lines will cause the input and output port vectors to have length 0, which would explain the observed behavior. There does not seem to be any code which increases the size of the vectors again. If this is so, the fix would be to reset each element to the unset value individually rather than removing elements. (I don't know how to write that in idiomatic C++.) I hope someone who has a working GNU Radio development environment (I've tried and failed, which is an unrelated problem) can try this fix. -- Kevin Reid <http://switchb.org/kpreid/> _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio