Output running ./demo.py infovis

output.txt

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Build a topic model (mallet) using a demo dataset (infovis)
  database = data/demo/infovis/corpus
    corpus = data/demo/infovis/corpus
     model = data/demo/infovis/model-mallet
       app = infovis_mallet
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    Available: data/demo/infovis/corpus
    Available: tools/mallet-2.0.7
    Available: tools/mallet-2.0.7
    Available: tools/corenlp-3.3.1
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Training an LDA topic model using MALLET...
       corpus = data/demo/infovis/corpus/corpus.txt
        model = data/demo/infovis/model-mallet
  token_regex = \w{3,}
       topics = 20
        iters = 1000
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    Already exists: data/demo/infovis/model-mallet
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Import a MALLET LDA topic model as a web2py application...
           app_name = infovis_mallet
           app_path = apps/infovis_mallet
         model_path = data/demo/infovis/model-mallet
    corpus_filename = data/demo/infovis/corpus/corpus.txt
  database_filename = data/demo/infovis/corpus/corpus.db
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Creating app: infovis_mallet [apps/temp_20150519_190201_826701_6147]
Creating folder: [apps/temp_20150519_190201_826701_6147/data]
Creating folder: [apps/temp_20150519_190201_826701_6147/databases]
Linking folder: [apps/temp_20150519_190201_826701_6147/models]
Linking folder: [apps/temp_20150519_190201_826701_6147/views]
Linking folder: [apps/temp_20150519_190201_826701_6147/controllers]
Linking folder: [apps/temp_20150519_190201_826701_6147/static]
Linking folder: [apps/temp_20150519_190201_826701_6147/modules]
Creating file: [apps/temp_20150519_190201_826701_6147/__init__.py]
Copying [data/demo/infovis/corpus/corpus.db] --> [apps/temp_20150519_190201_826701_6147/databases/corpus.db]
Copying [data/demo/infovis/corpus/corpus.txt] --> [apps/temp_20150519_190201_826701_6147/data/corpus.txt]
Extracting [data/demo/infovis/corpus/corpus.txt] --> [apps/temp_20150519_190201_826701_6147/data/sentences.txt]
Exception in thread "main" java.lang.UnsupportedClassVersionError: corenlp_helpers/SentenceSplitter : Unsupported major.minor version 52.0
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
Copying [data/demo/infovis/model-mallet] --> [apps/temp_20150519_190201_826701_6147/data/mallet-lda]
Computing bag-of-words statistics
          token_regex = \w{3,}
             min_freq = 5
         min_doc_freq = 3
       max_freq_count = 4000
    max_co_freq_count = 100000
Computing document-level statistics...
    Loading corpus: apps/temp_20150519_190201_826701_6147/data/corpus.txt
    Computing term freqs (449 docs)...
    Computing term co-occurrences (449 docs)...
    Saving term_texts (1526 terms)...
        inserting 1526 rows...
    Saving term_freqs (1526 terms)...
        inserting 1526 rows...
    Saving term_probs (1526 terms)...
        inserting 1526 rows...
    Saving term_doc_freqs (1526 terms)...
        inserting 1526 rows...
    Saving term_co_freqs (100000 term pairs)...
        inserting 100000 rows...
    Saving term_co_probs (100000 term pairs)...
        inserting 100000 rows...
    Saving term_g2 (100000 term pairs)...
        inserting 100000 rows...
Computing sentence-level term statistics...
    Loading corpus: apps/temp_20150519_190201_826701_6147/data/sentences.txt
An error occured while creating app: infovis_mallet [apps/infovis_mallet]
Traceback (most recent call last):
  File "bin/read_mallet.py", line 85, in <module>
    main()
  File "bin/read_mallet.py", line 82, in main
    ImportMalletLDA( args.app_name, args.model_path, args.corpus_path, args.database_path, args.quiet, args.overwrite )
  File "bin/read_mallet.py", line 62, in ImportMalletLDA
    bow_computer.Execute()
  File "/home/ethan/source/school/termite-data-server/bin/db/BOW_ComputeStats.py", line 44, in Execute
    self.ComputeAndSaveSentenceLevelStatistics()
  File "/home/ethan/source/school/termite-data-server/bin/db/BOW_ComputeStats.py", line 132, in ComputeAndSaveSentenceLevelStatistics
    corpus = { docID : docTokens for docID, docTokens in reader }
  File "/home/ethan/source/school/termite-data-server/bin/db/BOW_ComputeStats.py", line 132, in <dictcomp>
    corpus = { docID : docTokens for docID, docTokens in reader }
  File "/home/ethan/source/school/termite-data-server/bin/db/BOW_ComputeStats.py", line 55, in ReadCorpus
    with open( filename, 'r' ) as f:
IOError: [Errno 2] No such file or directory: 'apps/temp_20150519_190201_826701_6147/data/sentences.txt'

hi，have you solved this problem?