The error seems to occur when you don't have enough training data (and
train with cutoff 5). Try to train with
more data.
Jörn
On 09/02/2013 07:10 PM, Danica Damljanovic wrote:
Hi everyone
I am trying to retrain the Sentence Detector, however, I keep getting an
exception. I get the same result with the command line and
programmatically. Below is the command I ran and the output.
I use apache-opennlp-1.5.3, Mac OS Lion, and I tried with this sample text
I found in one of the online tutorials:
"Being at the polls was just like being at church.
I didn't smell a drop of liquor, and we didn't have a bit of trouble.
The campaign leading to the election was not so quiet.
It was marked by controversy, anonymous midnight phone calls and veiled
threats of violence.
During the election campaign, both candidates, Davis and Bush, reportedly
received anonymous telephone calls.
Ordinary Williams said he , too , was subjected to anonymous calls soon
after he scheduled the election.
Many local citizens feared that there would be irregularities at the polls.
Williams got himself a permit to carry a gun and promised an orderly
election.
He attended New York University before switching to Georgetown University
in Washington."
Any hint much appreciated.
bin/opennlp SentenceDetectorTrainer -encoding UTF-8 -lang en -data
en-sent.train -model en-sent.bin
Indexing events using cutoff of 5
Computing event counts... done. 9 events
Indexing... done.
Sorting and merging events... done. Reduced 9 events to 2.
Done indexing.
Incorporating indexed data for training...
done.
Number of Event Tokens: 2
Number of Outcomes: 1
Number of Predicates: 4
...done.
Computing model parameters ...
Performing 100 iterations.
1: ... loglikelihood=0.0 1.0
2: ... loglikelihood=0.0 1.0
Exception in thread "main" java.lang.IllegalArgumentException:
opennlp.tools.util.InvalidFormatException: The maxent model is not
compatible with the sentence detector!
at opennlp.tools.util.model.BaseModel.checkArtifactMap(BaseModel.java:476)
at opennlp.tools.sentdetect.SentenceModel.<init>(SentenceModel.java:54)
at
opennlp.tools.sentdetect.SentenceDetectorME.train(SentenceDetectorME.java:315)
at
opennlp.tools.cmdline.sentdetect.SentenceDetectorTrainerTool.run(SentenceDetectorTrainerTool.java:88)
at opennlp.tools.cmdline.CLI.main(CLI.java:222)
Caused by: opennlp.tools.util.InvalidFormatException: The maxent model is
not compatible with the sentence detector!
at
opennlp.tools.sentdetect.SentenceModel.validateArtifactMap(SentenceModel.java:117)
at opennlp.tools.util.model.BaseModel.checkArtifactMap(BaseModel.java:474)
... 4 more
Thanks in advance!
Danica
