Plugin GaussFit_OnSpot not working

Hello!

First post here; please excuse any faux pas.

I’'m trying to use this plugin GaussFit_OnSpotL http://imagej.net/plugins/gauss-fit-spot/index.html.

I downloaded it then installed it using Plugins > Install…

Following the instructions in the pdf description, I imported a text file greyscale image. Then using the multi-point tool I placed some points. Then I selected the pluggin. Instead of working, it gives me these errors:

java.lang.NullPointerException
	at org.scijava.minimaven.MavenProject$XMLHandler.endElement(MavenProject.java:1531)
	at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
	at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
	at org.scijava.minimaven.MavenProject.parse(MavenProject.java:1480)
	at org.scijava.minimaven.BuildEnvironment.parse(BuildEnvironment.java:217)
	at org.scijava.plugins.scripting.java.JavaEngine.fakePOM(JavaEngine.java:748)
	at org.scijava.plugins.scripting.java.JavaEngine.writeTemporaryProject(JavaEngine.java:630)
	at org.scijava.plugins.scripting.java.JavaEngine.access$800(JavaEngine.java:96)
	at org.scijava.plugins.scripting.java.JavaEngine$Builder.initialize(JavaEngine.java:436)
	at org.scijava.plugins.scripting.java.JavaEngine$Builder.access$200(JavaEngine.java:364)
	at org.scijava.plugins.scripting.java.JavaEngine.compile(JavaEngine.java:204)
	at org.scijava.plugins.scripting.java.JavaEngine.eval(JavaEngine.java:136)
	at org.scijava.plugins.scripting.java.JavaEngine.eval(JavaEngine.java:174)
	at org.scijava.script.ScriptModule.run(ScriptModule.java:177)
	at org.scijava.module.ModuleRunner.run(ModuleRunner.java:167)
	at org.scijava.module.ModuleRunner.call(ModuleRunner.java:126)
	at org.scijava.module.ModuleRunner.call(ModuleRunner.java:65)
	at org.scijava.thread.DefaultThreadService$2.call(DefaultThreadService.java:191)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

I’ve not used pluggins before so it could be something simple I’m doing wrong. I did try googling but couldn’t figure it out.