The libs.CopyLibs.classpath property is not set up.

C:\Users\maxxx\Document Management System\nbproject\build-impl.xml:366: The libs.CopyLibs.classpath property is not set up.
This property must point to
org-netbeans-modules-java-j2seproject-copylibstask.jar file which is part
of NetBeans IDE installation and is usually located at
/java/ant/extra folder.
Either open the project in the IDE and make sure CopyLibs library
exists or setup the property manually. For example like this:
ant -Dlibs.CopyLibs.classpath=C:\Program Files\NetBeans 6.7\java2\ant\extra/org-netbeans-modules-java-j2seproject-copylibstask.jar
BUILD FAILED (total time: 0 seconds)

The solution is in error itself.
Search for the jar file "org-netbeans-modules-java-j2seproject-copylibstask.jar" copy the path,

then go to tools menu -> options -> miscellaneous -> ant -> properties
add in that,

libs.CopyLibs.classpath=C\:Program FilesNetBeans 6.7java2antextraorg-netbeans-modules-java-j2seproject-copylibstask.jar

simply paste the path after "libs.CopyLibs.classpath=", and it will manage it.

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