Hello Katya!
I have the sam problem:
eclipse.buildId=4.3.0.M20130911-1000
java.version=1.7.0_51
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=es_ES
Framework arguments: -product org.eclipse.epp.package.java.product
Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.java.product
This is a continuation of log file C:\Users\WORTEN\workspace\.metadata\.bak_0.log
Created Time: 2014-01-28 11:43:38.427
Error
Tue Jan 28 11:43:42 CET 2014
File not found: C:\Users\WORTEN\workspace\BarcodeScanner\bin\classes\com\google\zxing\client\android\BeepManager.class.
java.io.FileNotFoundException: C:\Users\WORTEN\workspace\BarcodeScanner\bin\classes\com\google\zxing\client\android\BeepManager.class (El sistema no puede encontrar la ruta especificada)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.(Unknown Source)
at org.eclipse.core.internal.filesystem.local.LocalFile.openInputStream(LocalFile.java:368)
at org.eclipse.core.internal.localstore.FileSystemResourceManager.read(FileSystemResourceManager.java:797)
at org.eclipse.core.internal.resources.File.getContents(File.java:289)
at org.eclipse.jdt.internal.core.util.Util.getResourceContentsAsByteArray(Util.java:1132)
at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.writeClassFileCheck(IncrementalImageBuilder.java:888)
at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.writeClassFileContents(IncrementalImageBuilder.java:830)
at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.writeClassFile(AbstractImageBuilder.java:858)
at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.acceptResult(AbstractImageBuilder.java:189)
at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:510)
at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:366)
at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.compile(IncrementalImageBuilder.java:329)
at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:303)
at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.build(IncrementalImageBuilder.java:134)
at org.eclipse.jdt.internal.core.builder.JavaBuilder.buildDeltas(JavaBuilder.java:265)
at org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:193)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:733)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
If you would like I can fix it?