Unusual compilation error during compilation in ns3.43 environment

[Igor Plastov]

Hello!

I am learning the module Satellite (it requires  ns3.43).  All tests and examples are working. I have created my own example based on the Satellite's example sat-gw-handower-example.cc. My goal was to get pcap-files for traffic throw orbiters. Simulation successfully catches packets for all nodes but not for orbiters: pcap-files of orbiteers are empty. My code in attachment, a file sat-gw-handover-example_my_rollback.cc

To overcome issue with empty orbiters pcaps  I decided to change  method for catching packets from orbiter (my second code in attachment, a file sat-handover-fixed.cc),  Unfortunately, it's compilation ends  with strange error which is not understandable for me (and AI :):

```

from /home/igor/workspace_ns3.43/ns-3.43/build/include/ns3/bulk-send-helper.h:1,
                 from /home/igor/workspace_ns3.43/ns-3.43/build/include/ns3/applications-module.h:6,
                 from /home/igor/workspace_ns3.43/ns-3.43/scratch/sat-handover-fixed.cc:22:
/home/igor/workspace_ns3.43/ns-3.43/src/core/model/ptr.h: In instantiation of ‘ns3::Ptr<T>::Ptr(const ns3::Ptr<U>&) [with U = ns3::Ipv4; T = ns3::LoraLogicalChannel]’:
/home/igor/workspace_ns3.43/ns-3.43/scratch/sat-handover-fixed.cc:64:25:   required from here
/home/igor/workspace_ns3.43/ns-3.43/src/core/model/ptr.h:672:24: error: cannot convert ‘ns3::Ipv4*’ to ‘ns3::LoraLogicalChannel*’ in initialization
  672 |     : m_ptr(PeekPointer(o))
      |             ~~~~~~~~~~~^~~
      |                        |
      |                        ns3::Ipv4*
ninja: build stopped: subcommand failed.

```

So, my questions are:

1. What is the right way to capture pcap-filles from orbiters?

2. How to solve described compilation issue?

Best regards,
Igor

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[Igor Plastov]

Hi all,
I found the cause of the error: ninja's cash.

The error was fixed by cleaning ninja's cash:

rm -f ccache.conf build.ninja

Best regards,

Igor

ср, 1 апр. 2026 г. в 09:56, Igor Plastov <chetv...@gmail.com>: