无法清理和构建Netbeans 7.1 Beta

Cod*_*gry 3 java netbeans-7

在做干净和构建时,我得到以下错误.如何避免此错误.

Copying 1 file to E:\NIRAJ\Copyofcopyexample\build
E:\NIRAJ\Copyofcopyexample\nbproject\build-impl.xml:716: The following error occurred while executing this line:
E:\NIRAJ\Copyofcopyexample\nbproject\build-impl.xml:544: copylibs doesn't support the "rebase" attribute
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这是build-impl.xml

<copylibs compress="${jar.compress}" index="${jar.index}" indexMetaInf="${jar.index.metainf}" jarfile="${dist.jar}" manifest="@{manifest}" rebase="${copylibs.rebase}" runtimeclasspath="${run.classpath.without.build.classes.dir}">
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我使用的是Windows 7,jdk 1.6.以前我用Netbeans 6.9.1编译了相同的代码

anz*_*aan 9

尝试从build-impl.xml文件中删除 rebase ="$ {copylibs.rebase}"条目.