Hi,
I am trying to dynamically reconfigure some parameters of a flow graph. My flow graph is as follows.
File source --> stream to tagged stream --> OFDM transmitter --> usrp sink
In the top_block I do the following.
tb.stop()
tb.wait()
<do the reconfiguration>
tb.start()
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.
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
I appreciate if someone could help me to figure out what is causing this issue and how to fix it.