在 ant 编辑时报错 BUILD FAILED ; Error running javac.exe compiler

[selanglj]

BUILD FAILED
E:\Project\nwf\mlds\etc\build.xml:38:
Error running javac.exe compiler

<target name="compile">
<echo message="begin to build ..."></echo>
<javac encoding="GB2312" debug="on" fork="yes" source="1.5" target="1.5"
memoryinitialsize="100m" memorymaximumsize="512m"
srcdir="${PROJECT_HOME}/src"
destdir="${classes}"
includes="**/*.java" > //报错行
<classpath refid="class.path"/>
</javac>
</target>