On Wed, Aug 14, 2013 at 05:10:24PM -0400, Tom Rondeau wrote:
> Yes. From a scheduler standpoint, loops, as in traditional control
> loops with some required and guaranteed delay, are incredibly
> inefficient. And instead of figuring out how to support something like
> that, Eric made the decision very early on to just not allow them at
> all.
> 
> You can use the asynchronous message passing interface to do loops.

If this is any help, there's an example for async loops in 
gr-digital/examples/ofdm/rx_ofdm.grc.

MB

-- 
Karlsruhe Institute of Technology (KIT)
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KIT -- University of the State of Baden-Württemberg and
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