Troubleshooting

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Debugging tips

• Q. Is there a way to dereference a Ptr when in gdb?
• A. yes: p *ptr->m_ptr

• Q. What is this kind of build error representative of?

 assert failed. file=../src/core/type-id.cc, line=389, cond="uid != 0"
 Command ['/ns-3-dev/build/debug/examples/mixed-wireless'] exited with code -5

• A. The system can't find the specified TypeId. Check spelling, and whether it is prefixed with the namespace "ns3::"

• Q. What is this assertion indicating?

 assert failed. file=debug/ns3/tags.h, line=105, cond="sizeof (T) <= Tags::SIZE"

• A. The packet tag may be greater than Tags::SIZE (16 bytes)