Getting error when running sample, here is my stack trace.
C:\build examples\Ant_1_1>setupWin64.bat
C:\build examples\Ant_1_1>ant -f setup.xml -Dopsys=win64
Buildfile: C:\build examples\Ant_1_1\setup.xml
setup:
unzipEclipse_win64:
    [unzip] Expanding: C:\build examples\Ant_1_1\eclipse-rcp-indigo-SR2-win32-x86_64.zip into C:\build examples\Ant_1_1\setupEclipse
    [unzip] Failed to change file modification time
    [unzip] Failed to change file modification time
runAntRunner:
     [java]
     [java] BUILD FAILED
     [java] Buildfile: C:\build is not a file
     [java]
     [java] Total time: 0 seconds
     [java] An error has occurred. See the log file
     [java] C:\build\.metadata\.log.
BUILD FAILED
C:\build examples\Ant_1_1\setup.xml:30: The following error occurred while executing this line:
C:\build examples\Ant_1_1\setup.xml:69: Java returned: 13
Total time: 12 seconds
C:\build examples\Ant_1_1>echo %JAVA_HOME%
C:\Program Files\Java\jdk1.6.0_45
C:\build examples\Ant_1_1>dir
 Volume in drive C is OS
 Volume Serial Number is 4E43-5C68
 Directory of C:\build examples\Ant_1_1
27/11/2013  11:21    <DIR>          .
27/11/2013  11:21    <DIR>          ..
20/11/2013  15:47             5,194 build.xml
27/02/2013  01:12             2,226 com.windowtester.example.swtcontrols_test.source_1.0.0.201302270112.jar
27/02/2013  01:12             2,673 com.windowtester.example.swtcontrols_test_1.0.0.201302270112.jar
27/11/2013  11:14       189,478,955 eclipse-rcp-indigo-SR2-linux-gtk.tar.gz
27/11/2013  11:13       190,643,481 eclipse-rcp-indigo-SR2-win32-x86_64.zip
27/11/2013  11:13       190,655,641 eclipse-rcp-indigo-SR2-win32.zip
27/11/2013  11:15         1,033,218 eclipse-test-framework-3.7.2.zip
26/02/2013  01:57             7,280 library.xml.patched
27/11/2013  11:15         5,927,167 org.eclipse.sdk.examples-3.7.2.zip
27/11/2013  02:11             3,413 readme.txt
27/11/2013  02:07               129 runLinux32.sh
20/11/2013  15:57               242 runWin32.bat
20/11/2013  15:57               255 runWin64.bat
27/11/2013  02:15             3,683 setup.xml
27/11/2013  11:26    <DIR>          setupEclipse
27/11/2013  02:03                45 setupLinux32.sh
20/11/2013  15:40                30 setupWin32.bat
20/11/2013  15:39                30 setupWin64.bat
27/11/2013  02:13         9,491,850 WindowTesterRepo-6.1.0.201308212221-CommunityFixes.zip.zip
              18 File(s)    587,255,512 bytes
               3 Dir(s)  159,221,166,080 bytes free
C:\build examples\Ant_1_1>