doesn't detect modification using git tools

All,
I run cc2.8.2 on windows using git tools,when I update git repository,cc
failed to detect this update

log

[cc]十二月-06 13:32:48 Git           - Error executing git log command git log
-
p --pretty=raw '"@{ 1260077218}".."@{ 1260077568}"'
java.io.IOException: CreateProcess: git log -p --pretty=raw "@{
1260077218}".."@
{ 1260077568}" error=2

config

<project name="gps">

        <listeners>
            <currentbuildstatuslistener file="logs/gps/status.txt"/>
        </listeners>

        <bootstrappers>
            <execbootstrapper workingdir="projects/gps/"
command="c:\winnt\system32\cmd.exe" args="build.bat" />
        </bootstrappers>

        <modificationset quietperiod="5">
          <git LocalWorkingCopy="projects/gps/" />
        </modificationset>

        <schedule interval="30">
            <exec workingdir="projects/gps/"
command="c:\winnt\system32\cmd.exe" args="build.bat" />
        </schedule>

        <log>
            <merge dir="projects/gps/target/test-results"/>
        </log>

        <publishers>
            <onsuccess>
                <artifactspublisher dest="artifacts/gps"
file="projects/gps/target/gps.exe"/>
            </onsuccess>
        </publishers>

    </project>


Thanks for your help


Lynn

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