求问关于Swarm产生柱状图的问题 多谢大家了！！

mushroom89

各位好，我想请教一下，我想产生一个柱状图，但是在buildActions（）好像selector那有问题，说
9 v' @  q' @8 k1 }There was an error in creating a Selector for method step in Class swarm.analysis.EZDistributionImpl.
4 p, \. [9 A, N! E0 V, o4 J0 m) ?swarm.analysis.EZDistributionImpl.step returns null
- C2 H8 [& J. cThe process will be terminated.
2 j% Y" |. Z; p- }(Tcl -eval couldn't read file "F:Swarm-2.2-java/lib/tcl8.4//word.tcl": no such file or directory
; L5 z/ K& e0 x) [/ i% h. L1 d    while executing
6 N' h5 I# Y/ t6 P0 i0 _9 K, ^"source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl"
while evaluating: source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl
*** event raised for warning: WarningMessage
*** function: _i_ProbeMap__addProbe_(), file: /src/swarm/src/objectbase/ProbeMap.m, line: 606
; ?5 a+ G  t, b6 C2 ]6 v1 L5 VAttempt to add null probe
*** execution continuing...
请问第一个参数应该是什么呢 我设的是ezdist（一个EZDistribution object），
# t( z# k1 X( W. v# ^- B( P# I请问是怎么回事呢？多谢大家了~