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
6 A' s2 l1 [% l( l% bThere was an error in creating a Selector for method step in Class swarm.analysis.EZDistributionImpl.
/ r) T7 t5 D( {8 o0 a3 Bswarm.analysis.EZDistributionImpl.step returns null
1 X$ |# Z8 Q6 X8 y. `+ uThe 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
4 n: j# ]  R  J/ m% `, }"source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl"
3 [4 @; E6 T) B: J: q1 Q! ^while evaluating: source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl
' A- l) t3 `  C# i5 ^1 d*** event raised for warning: WarningMessage
*** function: _i_ProbeMap__addProbe_(), file: /src/swarm/src/objectbase/ProbeMap.m, line: 606
5 S' \/ ]! w4 G$ O, H* b  F# YAttempt to add null probe
9 K2 L7 B& v2 Y% Q  s1 y2 I*** execution continuing...
: s- s5 }6 G! h( n# h3 x+ C7 ]请问第一个参数应该是什么呢 我设的是ezdist（一个EZDistribution object），
: p, W- [) ~& T请问是怎么回事呢？多谢大家了~