"nothing was started" error during ant install step

Hi, I am keeping getting error when performig “ant install” step, below is the error log
Seems that when publishing ivy, I am gettig a “nothing was started” error. Can someone tell me how to resolve this? thanks!

ist-publish:
[copy] Copying 1 file to C:\Personal\software\opengamma\platform\OG-Platfor
m\projects\OG-Engine\dist
[copy] Copying 1 file to C:\Personal\software\opengamma\platform\OG-Platfor
m\projects\OG-Engine\dist

publish-local:
:: delivering :: com.opengamma#og-engine;working@KLI105PRI1 :: 1.2.0-local-20130
507180521 :: integration :: Tue May 07 18:05:21 GMT+08:00 2013
delivering ivy file to C:\Personal\software\opengamma\platform\OG-Platfo
rm\projects\OG-Engine\dist\ivy-ivy.xml
:: publishing :: com.opengamma#og-engine
published og-engine to C:\Users\Kevin L Li/repository/local/com.opengamm
a/og-engine/1.2.0-local-20130507180521.part/jars/og-engine.jar
published og-engine to C:\Users\Kevin L Li/repository/local/com.opengamm
a/og-engine/1.2.0-local-20130507180521.part/sources/og-engine.jar
published ivy to C:\Users\Kevin L Li/repository/local/com.opengamma/og-e
ngine/1.2.0-local-20130507180521.part/ivys/ivy.xml
publish aborted: nothing was started

BUILD FAILED
C:\Personal\software\opengamma\platform\OG-Platform\build.xml:730: The following
error occurred while executing this line:
C:\Personal\software\opengamma\platform\OG-Platform\build.xml:110: The following
error occurred while executing this line:
C:\Personal\software\opengamma\platform\OG-Platform\build.xml:99: The following
error occurred while executing this line:
C:\Personal\software\opengamma\platform\OG-Platform\common\common.xml:435: impos
sible to publish artifacts for com.opengamma#og-engine;working@KLI105PRI1: java.
io.IOException: publish transaction commit error for C:\Users\Kevin L Li\reposit
ory\local\com.opengamma\og-engine\1.2.0-local-20130507180521: rollback impossibl
e either, please remove C:\Users\Kevin L Li\repository\local\com.opengamma\og-en
gine\1.2.0-local-20130507180521.part manually

I’ve not seen this before. Have you got your own custom ivy setup? Or is OpenGamma the first ivy project you’ve used? How did you get the source code (git/tarball or zip with or without dependencies)?