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Groovy: primeros pasos

Nuevito con Groovy and Grailis

RedFinal - martes 22/11/2011
 Me tira este error la aplicación de ejemplo de la pagina de Groovy
Alguien puede darme una mano?
 
Welcome to Grails 1.3.7 - http://grails.org/
Licensed under Apache Standard License 2.0
Grails home is set to: C:\Users\cxc\Groovy\grails-1.3.7

Base Directory: C:\Users\cxc\Documents\NetBeansProjects\BookDemo
Resolving dependencies...
Dependencies resolved in 2180ms.
Running script C:\Users\cxc\Groovy\grails-1.3.7\scripts\RunApp.groovy
Environment set to development
  [groovyc] Compiling 2 source files to C:\Users\cxc\Documents\NetBeansProjects\BookDemo\target\classes
Running Grails application..
2011-11-21 22:30:56,573 [main] ERROR commons.DefaultGrailsApplication  - The class [bookdemo.Book] was not found when attempting to load Grails application. Skipping.
2011-11-21 22:31:09,154 [main] ERROR context.GrailsContextLoader  - Error executing bootstraps: No such property: book for class: BookController
Possible solutions: log
groovy.lang.MissingPropertyException: No such property: book for class: BookController
Possible solutions: log
at BookController.<init>(BookController.groovy)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at org.grails.tomcat.TomcatServer.start(TomcatServer.groovy:212)
at grails.web.container.EmbeddableServer$start.call(Unknown Source)
at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy:158)
at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy)
at _GrailsSettings_groovy$_run_closure10.doCall(_GrailsSettings_groovy:280)
at _GrailsSettings_groovy$_run_closure10.call(_GrailsSettings_groovy)
at _GrailsRun_groovy$_run_closure5.doCall(_GrailsRun_groovy:149)
at _GrailsRun_groovy$_run_closure5.call(_GrailsRun_groovy)
at _GrailsRun_groovy.runInline(_GrailsRun_groovy:116)
at _GrailsRun_groovy.this$4$runInline(_GrailsRun_groovy)
at _GrailsRun_groovy$_run_closure1.doCall(_GrailsRun_groovy:59)
at RunApp$_run_closure1.doCall(RunApp.groovy:33)
at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
at gant.Gant.withBuildListeners(Gant.groovy:427)
at gant.Gant.this$2$withBuildListeners(Gant.groovy)
at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
at gant.Gant.dispatch(Gant.groovy:415)
at gant.Gant.this$2$dispatch(Gant.groovy)
at gant.Gant.invokeMethod(Gant.groovy)
at gant.Gant.executeTargets(Gant.groovy:590)
at gant.Gant.executeTargets(Gant.groovy:589)
Application context shutting down...
Application context shutdown.
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