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From: | Damindra Bandara |
Subject: | Re: [Discuss-gnuradio] Reconfiguring OFDM flow graph at run time gives "FATAL: Missing a required length tag on port 0 at item" error |
Date: | Sat, 24 Dec 2016 09:46:13 -0500 |
On Sat, Dec 24, 2016 4:19 AM, Damindra Bandara address@hidden wrote:
DamindraThank you,I appreciate if someone could help me to figure out what is causing this issue and how to fix it.I have done parameter reconfiguration earlier(before introducing OFDM TX) and it worked fine. However now when I try to do the reconfiguration I get the following error.tb.start()<do the reconfiguration>tb.wait()tb.stop()In the top_block I do the following.File source --> stream to tagged stream --> OFDM transmitter --> usrp sinkHi,I am trying to dynamically reconfigure some parameters of a flow graph. My flow graph is as follows.
FATAL: Missing a required length tag on port 0 at item #160
thread[thread-per-block[2]: <block crc32_bb (16)>]: Missing length tag.
FATAL: Missing a required length tag on port 0 at item #160
thread[thread-per-block[18]: <block crc32_bb (27)>]: Missing length tag.
SSFATAL: Missing a required length tag on port 0 at item #0
FATAL: Missing a required length tag on port 0 at item #0
thread[thread-per-block[86]: <block ofdm_frame_equalizer_vcvc (62)>]: Missing length tag.
thread[thread-per-block[53]: <block ofdm_frame_equalizer_vcvc (93)>]: Missing length tag.
LLLLLLLLUU
--Damindra Savithri Bandara,Ph.D. in Information Technology (Candidate)
George Mason University,
Fairfax,
Virginia
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