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
There was an error in creating a Selector for method step in Class swarm.analysis.EZDistributionImpl.
swarm.analysis.EZDistributionImpl.step returns null
The process will be terminated.
! g+ ^( L" F4 I8 B" ?$ |# {(Tcl -eval couldn't read file "F:Swarm-2.2-java/lib/tcl8.4//word.tcl": no such file or directory
( E5 L& m9 X! i$ d    while executing
3 }, J" D+ V# c5 A# p9 ?"source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl"
- r8 b/ u: p& g3 D! H8 x# T- _- Ewhile evaluating: source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl
  G/ ], T4 V+ z# O, _: T*** event raised for warning: WarningMessage
! F" X, m, K2 v; j; @% ~, s*** function: _i_ProbeMap__addProbe_(), file: /src/swarm/src/objectbase/ProbeMap.m, line: 606
Attempt to add null probe
*** execution continuing...
8 G2 ^; Q# T& r* @) U  {请问第一个参数应该是什么呢 我设的是ezdist（一个EZDistribution object），
7 T( Z2 ~, t2 |! X/ h请问是怎么回事呢？多谢大家了~