Re: [Discuss-gnuradio] terminate called after throwing an instance of 'std::invalid_argument'

[Tom Rondeau]

On Fri, Jun 12, 2015 at 1:32 AM, shaunwang <address@hidden> wrote:

Hello Everyone

When I run AM radio GRC, I got this error
terminate called after throwing an instance of 'std::invalid_argument'
  what():  buffer_add_reader: nzero_preload must be >= 0

I google this error, and it says this is bug 693. but I cannot fix it. Thank
you!

Shaun AM_test.grc <http://gnuradio.4.n7.nabble.com/file/n54156/AM_test.grc>

Shaun,

You need to specify taps for the filter in the Frequency Xlating FIR Filter block. It's a flaw in the validation step of GRC that it doesn't properly check that a vector is empty. But the filter won't work without you defining it.

Tom