java - Issue while compiling in Netbeans: taskdef class CopyLibs cannot be found using the classloader AntClassLoader[] -

so i've been having issues trying compile in netbeans program i've been writing. i've not had issue until started integrate game engine i've been doing, however, when started doing this.

the error receiving is: taskdef class copylibs cannot found using classloader antclassloader[].

<taskdef classname="org.netbeans.modules.java.j2seproject.copylibstask.copylibs" classpath="${libs.copylibs.classpath}" name="copylibs"/> <copylibs compress="${jar.compress}" index="${jar.index}" indexmetainf="${jar.index.metainf}" jarfile="${dist.jar}" manifest="@{manifest}" rebase="${copylibs.rebase}" runtimeclasspath="${run.classpath.without.build.classes.dir}">      <fileset dir="${build.classes.dir}"/>          <manifest>               <attribute name="class-path" value="${jar.classpath}"/>               <customize/>          </manifest> </copylibs> 

i have done nothing build xml file. don't understand or why has occurred. prevents me being able build , compile code distribute it.

i have done research within google, doesn't seem famous issue. have reinstalled netbeans newer version , still error. i'm not sure how fix or understand how fix this.

any appreciated.

the answer folder missing lib folder.

when setting project had set lib folder, , when couldn't find "copylibs" threw error stating jar file not found.

you can fix creating new project , copying directory "copylibs" project , should fix issue.