[ndnSIM] [EXT] Error when Generating 3rd Consumer Justin Rodrigues

[Junxiao Shi]

Hi Justin

Have you followed the advice in the error message?

Error: attempting to enable the packet metadata subsystem too late in the
simulation, which is not allowed.
A common cause for this problem is to enable ASCII tracing after sending
any packets.  *One way to fix this problem is to call
ns3::PacketMetadata::Enable () near the beginning of the program*, before
any packets are sent.

Yours, Junxiao

On Tue, Jul 6, 2021 at 14:28 Justin Rodrigues via ndnSIM <
ndnsim at lists.cs.ucla.edu> wrote:

> *External Email*
> Hello everyone,
>
> I hope you are doing well. I am receiving this error when I am generating
> a third consumer in the mobility tree walk example.
>
> [3596/3638] Linking
> build/src/ndnSIM/examples/ns3.30.1-mobility-tree-walk4-debug
> Waf: Leaving directory
> `/home/justin/Downloads/ndn_sim_mobility/ndnsim/ns-3/build'
> Build commands will be stored in build/compile_commands.json
> 'build' finished successfully (13.571s)
> Could not load plugin 'show_last_packets.py': No module named 'kiwi.ui'
> Could not load icon applets-screenshooter due to missing gnomedesktop
> Python module
> assert failed. cond="!m_metadataSkipped", msg="Error: attempting to enable
> the packet metadata subsystem too late in the simulation, which is not
> allowed.
> A common cause for this problem is to enable ASCII tracing after sending
> any packets.  One way to fix this problem is to call
> ns3::PacketMetadata::Enable () near the beginning of the program, before
> any packets are sent.", file=../src/network/model/packet-metadata.cc,
> line=61
> terminate called without an active exception
> Command
> ['/home/justin/Downloads/ndn_sim_mobility/ndnsim/ns-3/build/src/ndnSIM/examples/ns3.30.1-mobility-tree-walk4-debug',
> '--SimulatorImplementationType=ns3::VisualSimulatorImpl'] terminated with
> signal SIGIOT. Run it under a debugger to get more information (./waf --run
> <program> --command-template="gdb --args %s <args>").
>
> Anyone know what could be the cause?
>
> Thanks,
>
> Justin Rodrigues
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> ndnSIM at lists.cs.ucla.edu
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>
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