On Fri, Jun 12, 2015 at 1:32 AM, shaunwang <shaunwangford...@gmail.com> 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
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