(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
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 R. http://switchb.org/kpreid/