[ns] How can see ERR message in the trace?

[deng qianhua]

Hi all,
In my simulation, I used TwoStateMarkov error model to simulate the  link
errors of 802.11 adhoc network.But my problem is not being able to see "-Nw
ERR" in ns-2 trace. I turned on all traces but I could not see any ERR
message in trace. I saw RET DUP BSY COL  . When I changed (increased ) the
rate I saw more RET. I think it is because after exceeding the retry limit
a corrupted packet is discarded and denoted as RET . Even if I let the retry
limit equal 0, no "ERR" appears in trace file.

How Can I see ERR message in the trace. I really appreciate your help.

Would you help me about this ? please.

Best Regards
Deng