CBF Compiling Errors

Hi dears,

I want to develop Pentaho CE with source code.
So I was decided to use Pentaho Community Build Framework(CBF) and follow as this site.
http://wiki.pentaho.com/display/COM/...uild+Framework
Compiling process is nearly ok.
But I have following errors. I am not sure what are I modified.

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install-kettle-plugins:
[unzip] Expanding: D:\Java\PentahoWorkspace\cbf-quickstart\target-build\bi-platform-build\kettle-plugins\pentaho-big-data-plugin-1.3.0.zip into D:\Java\PentahoWorkspace\cbf-quickstart\target-build\tomcat-pci-test\biserver-ce\pentaho-solutions\system\kettle\plugins

assemble:

prep-dev-biserver:
[xmlvalidate] 1 file(s) have been successfully validated.

dev-update:
Duplicated project name in import. Project subfloor defined first in D:\Java\PentahoWorkspace\cbf-quickstart\target-build\bi-platform-assembly\build-res\subfloor.xml and again in D:\Java\PentahoWorkspace\cbf-quickstart\target-build\bi-platform-api\build-res\subfloor.xml

init:

compile.pre:

compile.compile:
[javac] Compiling 165 source files to D:\Java\PentahoWorkspace\cbf-quickstart\target-build\tomcat-pci-test\biserver-ce\tomcat\webapps\pentaho\WEB-INF\classes
[javac] javac: no source files
[javac] Usage: javac <options> <source files>
[javac] use -help for a list of possible options

BUILD FAILED
D:\Java\PentahoWorkspace\cbf-quickstart\build.xml:293: The following error occurred while executing this line:
D:\Java\PentahoWorkspace\cbf-quickstart\target-build\bi-platform-build\dev_build.xml:157: The following error occurred while executing this line:
D:\Java\PentahoWorkspace\cbf-quickstart\target-build\bi-platform-build\dev_build.xml:159: The following error occurred while executing this line:
D:\Java\PentahoWorkspace\cbf-quickstart\target-build\bi-platform-api\build-res\subfloor.xml:1151: Compile failed; see the compiler error output for details.

Total time: 8 minutes 59 seconds
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Please let me know your opinion.

Regards,
Ye` Win.