Hi all,

I am having trouble with the RFNoC FFT. When using an FFT length of 256 or less 
everything works smoothly but when I use a 512 or 1024 length FFT I begin to 
receive a flood of repeating packet errors like: ERROR_CODE_BAD_PACKET (Code: 
0xf).  I haven't been able to find any information on this type of error and I 
am sure that I am missing something o.
I am using the configuration from the "getting started with RFNoC 4" document 
from the knowledgebase. It is my understanding that the default RFNoC FFT 
should be able to go up to an FFT Length of 1024.



Full packet error is shown below:

[ERROR] [STREAMER] The receive transport caught a value exception.
ValueError: Bad CHDR header or invalid packet length.
gr::log :WARN: rfnoc_rx_streamer0 - RFNoC Streamer block received error 
ERROR_CODE_BAD_PACKET (Code: 0xf)
[ERROR] [STREAMER] The receive transport caught a value exception.
ValueError: Bad CHDR header or invalid packet length.

Here is a screenshot of the generic flowgraph I am using for troubleshooting: 
https://imgur.com/a/HLnPrXj


I am working with UHD 4 and GNURadio 3.8 and I am running on an X310.


Thank you in advance,


Rylee Mattingly
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