You'll need to open the packet_tx example from the same folder, and hit "generate" on that, and then reload the block library.
On Thu, 2020-03-05 at 13:56 +0300, Ahmet DEMIR wrote: > Thanks a lot for the help. I am using linux ubuntu 18.04 operating system. > When I want to use the uhd_packet_tx.grc example given in > Gnuradio/examples/digital/packet folder, I see that a block is missing as can > be seen at below figure(Example is taken from Gnuradio3.8 version). What is > this block for? Do I have an uninstalled package? I am beginner in this area. > If you help me, I am very pleased to you.
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