hello i write a grc,i use the virtual sink and virtual source,the grc woked well when i replace the virtual sin and source with usrp sink and source,there is a problem occured the message is:
gr::log :FATAL: repack_bits_bb0 - Missing a required length tag on port 0 at item #0 thread[thread-per-block[10]: <block repack_bits_bb (10)>]: Missing length tag. i have set the block (repack bits)'s parameter length tag key == "tsb_tag", but what this message "missing length tag" mean, thank you
chat_app.grc
Description: Binary data
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