NullPointerException with sentence detection

[J. McConnell]

I am trying to run the EnglishSentenceDetectorME and am always getting a NullPointerException.

I am using the command line from the javadocs:

java opennlp.grok.preprocess.sentdetect.EnglishSentenceDetectorME "First sentence. Second sentence? Here is another one. And so on and so forth - you get the idea."

This always results in the following stack trace:

Exception in thread "main" java.lang.NullPointerException
        at java.util.zip.InflaterInputStream.<init>(InflaterInputStream.java:66)
        at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:56)
        at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:68)
        at opennlp.grok.preprocess.sentdetect.EnglishSentenceDetectorME.getModel(EnglishSentenceDetectorME.java:47)
        at opennlp.grok.preprocess.sentdetect.EnglishSentenceDetectorME.<init>(EnglishSentenceDetectorME.java:42)
        at opennlp.grok.preprocess.sentdetect.EnglishSentenceDetectorME.main(EnglishSentenceDetectorME.java:61)

Does anyone know what could be wrong?  I would really appreciate some help and am excited to begin using this software.

Thanks,

J.

[Jason Baldridge]

Looks like the maxent models aren't in your classpath. Make sure that you have ${GROK_HOME}/src/java in your classpath, and it should work out.

Having said that, you should check out the code in opennlp.sentdetect, where this package is currently being maintained. See:

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/opennlp/opennlp/src/java/opennlp/sentdetect/

Sorry to have taken so long to respond --- seem to have missed your message since I haven't been monitoring the forums closely lately.

Jason