Re: [Discuss-gnuradio] Hierarchical blocks (arbitrary or variable numbers of inputs or outputs not supported)

On Thu, Jul 24, 2014 at 1:19 PM, Orin Lincoln <orindlincoln@gatech.edu> wrote:

Hello,

I am trying to create a hierarchical block with a variable number of outputs, but I get this error:
"RuntimeError: Hierarchical blocks do not yet support arbitrary or variable numbers of inputs or outputs"

This appears to be a known issue [1], and I'm wondering what the best work around is. I think I can simply create an IO Signature with the maximum possible outputs I will need, and then connect a null source to all of the outputs I'm not intending to use. Is that a good idea?

Thanks,
Orin

[1] https://lists.gnu.org/archive/html/discuss-gnuradio/2009-04/msg00011.html

Orin,

Yep, that's the best way to handle this case.

Tom