[ns] error model

[Laurent <lcavallin@run.montefiore.ulg.ac.be>]

How can i use the 2states markov model with ns (i use ns2.1b8)?
I tried this but it doesn't work:
----------------------------------------------
set rate [list  0.3 0.7 ]
set transition [list 0.1 0.9 ]
set transunit pkt
set errObj [new ErrorModel/TwoState $rate $transunit $transition]
----------------------------------------------

I have the following errors:
----------------------------
no value given for parameter "rv0" to "_o59"
    (Object next line 1)
    invoked from within
"$self next"
    (procedure "_o59" line 2)
    (ErrorModel/TwoStateMarkov init line 2)
    invoked from within
"_o59 init {0.3 0.7} pkt {0.3 0.7}"
    (Class create line 1)
    invoked from within
"ErrorModel/TwoStateMarkov create _o59 {0.3 0.7} pkt {0.3 0.7}"
    invoked from within
"catch "$className create $o $args" msg"
    (procedure "new" line 3)
    invoked from within
"new ErrorModel/TwoStateMarkov $rate $transunit $transition"
    (procedure "MarkovErrorProc" line 7)



Laurent