1:Hello.scala

// http://www.playframework.org/documentation/1.1-trunk/firstapp

package controllers

import play.mvc._
import play.data.validation._           // @Required

object Hello extends Controller {
  def index = render()

  def sayHello(@Required myName: String) {
    if(validation.hasErrors()) {
      flash.error("Oops, plase enter your name!")
      index
    }
    render(myName)
  }
}

2.log.txt

Compilation error (In /app/controllers/Hello.scala around line 15)
The file /app/controllers/Hello.scala could not be compiled. Error raised is : value hasErrors is not a member of play.data.validation.Validation

play.exceptions.CompilationException: value hasErrors is not a member of play.data.validation.Validation
        at play.scalasupport.core.ScalaPlugin$ScalaCompiler$$anon$1.info0(ScalaPlugin.scala:153)
        at play.scalasupport.core.ScalaPlugin$ScalaCompiler.compile(ScalaPlugin.scala:257)
        at play.scalasupport.core.ScalaPlugin.compile(ScalaPlugin.scala:141)
        at play.scalasupport.core.ScalaPlugin.onClassesChange(ScalaPlugin.scala:125)
        at play.classloading.ApplicationClassloader.detectChanges(ApplicationClassloader.java:249)
        at play.Play.detectChanges(Play.java:476)
        at play.Invoker$Invocation.init(Invoker.java:98)
        at Invocation.HTTP Request(Play!)

3.envs.txt

Scala: 2.8.0.RC1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_15)
Play: play-1.1-unstable-r881
module: scala-0.3