What causes NullPointerException at CopyLibletsTask.execute when specifying libarary jar

Hi all,

I'm getting a weird error that I cannot figure out.  I have a project I'm working on and when I specify a library jar I wrote (well, I hacked the Dallas 1-wire library to JavaME),  I get this error:

Expanding: C:\SAVE\Home\Development\NetbeansProjects\J2ME_OWLib\dist\J2ME_OWLib.jar into C:\SAVE\Home\Development\NetbeansProjects\ADS1115_Test\build\fatjar
C:\SAVE\Home\Development\NetbeansProjects\ADS1115_Test\nbproject\build-impl.xml:468: 
java.lang.NullPointerException
	at org.netbeans.modules.j2me.common.ant.CopyLibletsTask.execute(CopyLibletsTask.java:93)
	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
	at sun.reflect.GeneratedMethodAccessor161.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
	at org.apache.tools.ant.Task.perform(Task.java:348)
	at org.apache.tools.ant.Target.execute(Target.java:435)
	at org.apache.tools.ant.Target.performTasks(Target.java:456)
	at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
	at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
	at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
	at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
	at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:286)
	at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:555)
	at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:153)
BUILD FAILED (total time: 0 seconds)

If I remove that library, it builds just fine.  I'm stumped!!  What is causing the problem?

Bruce