deleted project... added again into workspace...
repeated 3-4 times and issue resolved..

On Feb 25, 2:39 pm, Ajay <a.aja...@gmail.com> wrote:
> !ENTRY org.eclipse.core.resources 4 2 2011-02-25 15:07:29.445
> !MESSAGE Problems occurred when invoking code from plug-in:
> "org.eclipse.core.resources".
> !STACK 0
> java.lang.NullPointerException
>         at
> com.android.ide.eclipse.adt.internal.build.builders.PreCompilerBuilder.buil 
> d(PreCompilerBuilder.java:
> 198)
>         at org.eclipse.core.internal.events.BuildManager
> $2.run(BuildManager.java:629)
>         at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
>         at
> org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:
> 172)
>         at
> org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:
> 203)
>         at org.eclipse.core.internal.events.BuildManager
> $1.run(BuildManager.java:255)
>         at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
>         at
> org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:
> 258)
>         at
> org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:
> 220)
>         at
> org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:
> 362)
>         at org.eclipse.core.internal.resources.Project$1.run(Project.java:
> 545)
>         at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:
> 1975)
>         at
> org.eclipse.core.internal.resources.Project.internalBuild(Project.java:
> 524)
>         at org.eclipse.core.internal.resources.Project.build(Project.java:
> 115)
>         at
> org.eclipse.ui.actions.BuildAction.invokeOperation(BuildAction.java:
> 222)
>         at
> org.eclipse.ui.actions.WorkspaceAction.execute(WorkspaceAction.java:
> 162)
>         at org.eclipse.ui.actions.WorkspaceAction
> $2.runInWorkspace(WorkspaceAction.java:483)
>         at
> org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorksp 
> aceJob.java:
> 38)
>         at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
>
> !ENTRY org.eclipse.ui.ide 4 4 2011-02-25 15:07:39.406
> !MESSAGE Problems occurred building the selected resources.
> !SUBENTRY 1 com.android.ide.eclipse.adt 4 75 2011-02-25 15:07:39.406
> !MESSAGE Errors running builder 'Android Pre Compiler' on project
> 'P2L'.
> !STACK 0
> java.lang.NullPointerException
>         at
> com.android.ide.eclipse.adt.internal.build.builders.PreCompilerBuilder.buil 
> d(PreCompilerBuilder.java:
> 198)
>         at org.eclipse.core.internal.events.BuildManager
> $2.run(BuildManager.java:629)
>         at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
>         at
> org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:
> 172)
>         at
> org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:
> 203)
>         at org.eclipse.core.internal.events.BuildManager
> $1.run(BuildManager.java:255)
>         at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
>         at
> org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:
> 258)
>         at
> org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:
> 220)
>         at
> org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:
> 362)
>         at org.eclipse.core.internal.resources.Project$1.run(Project.java:
> 545)
>         at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:
> 1975)
>         at
> org.eclipse.core.internal.resources.Project.internalBuild(Project.java:
> 524)
>         at org.eclipse.core.internal.resources.Project.build(Project.java:
> 115)
>         at
> org.eclipse.ui.actions.BuildAction.invokeOperation(BuildAction.java:
> 222)
>         at
> org.eclipse.ui.actions.WorkspaceAction.execute(WorkspaceAction.java:
> 162)
>         at org.eclipse.ui.actions.WorkspaceAction
> $2.runInWorkspace(WorkspaceAction.java:483)
>         at
> org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorksp 
> aceJob.java:
> 38)
>         at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
>
> This errors came recently after eclipse update..
> Roolback to previous version fails :(..
>
> On Feb 25, 3:40 am, Xavier Ducrohet <x...@android.com> wrote:
>
>
>
>
>
>
>
> > This is extremely strange.
> > Can you send me the log of your workspace?
>
> > On Wed, Feb 23, 2011 at 9:52 PM, Chopcsu <st...@kilsby.com.au> wrote:
> > > Hi All,
>
> > > I have just installed ADT 10 with SDK 3.0. Eclipse has been working
> > > ok, but now all of a sudden my project has broken down with eclipse
> > > either complaining there is something wrong with xml files where there
> > > is nothing wrong (tested on a non adt10 eclipse and works fine) or
> > > giving errors
>
> > > Errors running builder 'Android Pre Compiler' on project 'XXXX'.
> > > java.lang.NullPointerException encountered while running Android Pre
> > > Compiler.
>
> > > Or giving errors
>
> > > Problems occurred when invoking code from plug-in:
> > > "org.eclipse.core.resources".
>
> > > java.lang.NullPointerException
> > >        at
> > > com.android.ide.eclipse.adt.internal.build.builders.PreCompilerBuilder.buil
> > >  d(PreCompilerBuilder.java:
> > > 198)
> > >        at org.eclipse.core.internal.events.BuildManager
> > > $2.run(BuildManager.java:633)
> > >        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
> > >        at
> > > org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:
> > > 170)
> > >        at
> > > org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:
> > > 201)
> > >        at org.eclipse.core.internal.events.BuildManager
> > > $1.run(BuildManager.java:253)
> > >        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
> > >        at
> > > org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:
> > > 256)
> > >        at
> > > org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.j
> > >  ava:
> > > 309)
> > >        at
> > > org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:
> > > 341)
> > >        at
> > > org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:
> > > 140)
> > >        at
> > > org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:
> > > 238)
> > >        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
>
> > > At the moment I am going through the paces of changing adt back to an
> > > older verison, Does anyone have an idea of these problems?
>
> > > --
> > > You received this message because you are subscribed to the Google> > 
> > > Groups "Android Developers" group.> To post to this group, send 
> > > emailtoandroid-develop...@googlegroups.com> > To unsubscribe from this 
> > > group, send email to>android-developers+unsubscr...@googlegroups.com
> > > For more options, visit this group at
> > >http://groups.google.com/group/android-developers?hl=en
>
> > --
> > Xavier Ducrohet
> > Android SDK Tech Lead
> > Google Inc.http://developer.android.com|http://tools.android.com
>
> > Please do not send me questions directly. Thanks!

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