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
" O' q: E( G* h+ mThere was an error in creating a Selector for method step in Class swarm.analysis.EZDistributionImpl.
/ v6 c8 z) J0 U- Vswarm.analysis.EZDistributionImpl.step returns null
The process will be terminated.
(Tcl -eval couldn't read file "F:Swarm-2.2-java/lib/tcl8.4//word.tcl": no such file or directory
    while executing
+ t% C/ d: J1 v"source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl"
3 _1 {& e  }/ Cwhile evaluating: source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl
*** event raised for warning: WarningMessage
+ I, ^8 U* Z# O* S8 j7 X4 O*** function: _i_ProbeMap__addProbe_(), file: /src/swarm/src/objectbase/ProbeMap.m, line: 606
Attempt 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），
请问是怎么回事呢？多谢大家了~