Re: problem running or building JSP application after upgrade to 6.7

I have a JSP application which I manage.  I upgraded from 6.0 to 6.7 and get the following error if I try to run/compile the program:

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Could not load definitions from resource org/netbeans/modules/java/j2seproject/copylibstask/antlib.xml. It could not be found.

init:

deps-module-jar:

deps-ear-jar:

deps-jar:

library-inclusion-in-archive:

C:\Users\Paul.Dobson\Documents\NB Projecs\WebTool\nbproject\build-impl.xml:531: Problem: failed to create task or type copyfiles

Cause: The name is undefined.

Action: Check the spelling.

Action: Check that any custom tasks/types have been declared.

Action: Check that any <presetdef>/<macrodef> declarations have taken place.

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The following is a snippet from my build-impl.xml line 531:

<target depends="init" name="library-inclusion-in-archive" unless="dist.ear.dir">

        <copyfiles files="${file.reference.jcifs-1.1.0.jar}" todir="${build.web.dir}/WEB-INF/lib"/>   (This is line 531)

        <copyfiles files="${file.reference.jcommon-1.0.9.jar}" todir="${build.web.dir}/WEB-INF/lib"/>

        <copyfiles files="${file.reference.jfreechart-1.0.5.jar}" todir="${build.web.dir}/WEB-INF/lib"/>

Thank you in advance for any ideas on how to resolve  the error.