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 o. P0 Z  T7 ^There was an error in creating a Selector for method step in Class swarm.analysis.EZDistributionImpl.
2 z* W4 e* C7 h9 T9 E( g2 N+ _; rswarm.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
"source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl"
/ u; l6 w$ N5 Q, b5 @while evaluating: source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl
/ a3 V. P" g' ]*** event raised for warning: WarningMessage
6 `( y$ r( S/ s, _' j, C*** function: _i_ProbeMap__addProbe_(), file: /src/swarm/src/objectbase/ProbeMap.m, line: 606
* d4 f# j; W$ Z* VAttempt to add null probe
4 \. L7 w3 l! b0 N8 E  s5 W*** execution continuing...
" M: E( ?. m3 Y4 ]请问第一个参数应该是什么呢 我设的是ezdist（一个EZDistribution object），
6 `: Y6 r$ b" N9 v; u请问是怎么回事呢？多谢大家了~