[Discuss-gnuradio] problem with 3.6.2

[Stephen]

Hi,

I was using 3.6 with no issues. Today I updated to 3.6.3 and get the
following error when I try to start the flowgraph. I did rebuild all
parts of my application.

terminate called after throwing an instance of 'Using Volk machine:
sse4_1_64_orc
std::invalid_argument'
  what():  gr_buffer_add_reader: nzero_preload must be >= 0
The program has unexpectedly finished.

Does anyone have any idea where I could start looking?

thanks,
steve