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 K5 i: B1 @. `8 a9 DThere was an error in creating a Selector for method step in Class swarm.analysis.EZDistributionImpl.
% e7 o& a- `9 [: Z; Tswarm.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
! p1 p* q; l2 T"source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl"
' w$ i. U3 I5 Y$ j" j9 lwhile evaluating: source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl
*** event raised for warning: WarningMessage
2 w" U4 d/ n5 Q/ h' k% p% H9 h  L! K*** function: _i_ProbeMap__addProbe_(), file: /src/swarm/src/objectbase/ProbeMap.m, line: 606
Attempt to add null probe
*** execution continuing...
- Q; u  Z9 ~+ M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~