error while creating displays

panllrose

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6 x" K% ]( B: i" f! \0 o- p7 v运行程序时，repast给出的错误信息看不明白，怎么查找问题所在呢？我的版本是RS1.2.0，参考predator prey示例写的，context只有一个continuous space，上面分布pedestrian.agent。错误信息如下：
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2012/06/13 09:59:23,312: Error while creating displays
java.lang.RuntimeException: Projection 'ContinuousSpace' not found.
9 _7 Y' ^9 }/ Z        at repast.simphony.visualization.engine.DisplayProducer.createLayout(DisplayProducer.java:540)
        at repast.simphony.visualization.engine.DisplayProducer.createDisplay2D(DisplayProducer.java:187)
        at repast.simphony.visualization.engine.DisplayProducer.createDisplay(DisplayProducer.java:88)
7 e8 J  S% p. I" h* i        at repast.simphony.visualization.engine.DisplayComponentControllerAction.runInitialize(DisplayComponentControllerAction.java:90)
        at repast.simphony.engine.controller.DefaultController$2.visit(DefaultController.java:171)
        at repast.simphony.engine.controller.DefaultController$2.visit(DefaultController.java:1)
7 {* p% j& N6 E+ C* f        at repast.simphony.util.collections.NaryTree.preOrderTraverals(NaryTree.java:287)
        at repast.simphony.util.collections.NaryTree.preOrderTraverals(NaryTree.java:290)
* g. n# P% j; i        at repast.simphony.util.collections.NaryTree.preOrderTraverals(NaryTree.java:290)
7 C) q2 Q# _4 o5 F. B" m9 W        at repast.simphony.util.collections.NaryTree.preOrderTraversal(NaryTree.java:283)
$ i7 V6 W! h/ }6 \! p4 E  h        at repast.simphony.engine.controller.DefaultController.runInitialize(DefaultController.java:169)
        at repast.simphony.engine.controller.DefaultController.runInitialize(DefaultController.java:324)
  q% i' q8 D7 b/ s, q        at repast.simphony.ui.RSApplication.initSim(RSApplication.java:134)
  \4 x* ]8 X) r+ m! b% U  L        at repast.simphony.ui.action.InitRun.actionPerformed(InitRun.java:17)
$ u6 ^, n$ x7 N        at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
        at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
* p, s2 q* T# {1 k        at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
0 d- ~5 n, d/ j3 K1 F        at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
        at java.awt.Component.processMouseEvent(Unknown Source)
( s% l) [2 ~6 B, A        at javax.swing.JComponent.processMouseEvent(Unknown Source)
& K' S+ Q% I" K% H& O* \        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
( x; N) i1 N2 n- {/ q1 G1 \8 B1 b        at java.awt.Component.dispatchEventImpl(Unknown Source)
8 ~$ G1 r8 d2 U4 K% h) H/ J        at java.awt.Container.dispatchEventImpl(Unknown Source)
1 }6 q6 ]* P& [- M' ]5 M4 M        at java.awt.Component.dispatchEvent(Unknown Source)
) u- N0 Q6 _5 S8 `        at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
1 I' Y" J" I* l- h2 o5 U/ @3 u        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
* }' I5 Q. z9 p. B1 Z0 d- J7 P        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
, m+ I' Y+ X5 w) v9 e/ L        at java.awt.Component.dispatchEvent(Unknown Source)
) L- o- [6 B( u! |/ J        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
1 x0 \! n8 {8 c5 \% i$ J, u/ `' R; |        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
# a9 }; z/ G1 v% \  ?        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)