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.
(Tcl -eval couldn't read file "F:Swarm-2.2-java/lib/tcl8.4//word.tcl": no such file or directory
    while executing
+ ?+ P: U8 V# {/ `" n8 z* J+ o/ ^, t+ i"source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl"
while evaluating: source F:\Swarm-2.2-java/lib/tcl8.4//word.tcl
2 p7 m0 j: D5 z* k, y' @*** event raised for warning: WarningMessage
5 Q0 F* ]# y( n5 h*** function: _i_ProbeMap__addProbe_(), file: /src/swarm/src/objectbase/ProbeMap.m, line: 606
( J7 ]  A3 e* ?9 R9 S% n6 o" e1 L' S/ p# UAttempt to add null probe
*** execution continuing...
+ u; ^# _4 T9 f; c1 a/ n请问第一个参数应该是什么呢 我设的是ezdist（一个EZDistribution object），
0 x; V. j' C" L8 o请问是怎么回事呢？多谢大家了~