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
3 W$ u: A# f4 d' r# z. H" kThere was an error in creating a Selector for method step in Class swarm.analysis.EZDistributionImpl.
" I$ j( b3 j, Mswarm.analysis.EZDistributionImpl.step returns null
The process will be terminated.
- e! S: Z, f9 W0 H- H8 q- J(Tcl -eval couldn't read file "F:Swarm-2.2-java/lib/tcl8.4//word.tcl": no such file or directory
6 H! M, y  S0 M. B) S, @    while executing
* r7 v: ]* |, [5 e; ~3 {% f/ G"source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl"
while evaluating: source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl
- Y7 o  T1 T9 {/ u; T7 d*** event raised for warning: WarningMessage
*** function: _i_ProbeMap__addProbe_(), file: /src/swarm/src/objectbase/ProbeMap.m, line: 606
Attempt to add null probe
! ?& C8 A( O0 X*** execution continuing...
. g# O8 G5 S( y6 H  x* L9 g' n请问第一个参数应该是什么呢 我设的是ezdist（一个EZDistribution object），
( M& g8 ~5 Q+ j0 {! @请问是怎么回事呢？多谢大家了~