即使Java中存在文件，也没有此类文件或目录错误

我是Java的新手，我希望运行该库JGibbLDA。我按照文档的要求进行了操作，输入的根目录JGibbLDA-v.1.0并输入命令：

java -mx512M -cp bin:lib/args4j-2.0.6.jar jgibblda.LDA -est -alpha 0.5 -beta 0.1 -ntopics 100 -niters 1000 -savestep 100 -twords 20 -dfile models/data/data.txt

但是会发生错误：

Read Dataset Error: /models/data/data.txt (No such file or directory)
java.io.FileNotFoundException: /models/data/data.txt (No such file or directory)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)
at java.io.FileInputStream.<init>(FileInputStream.java:138)
at java.io.FileInputStream.<init>(FileInputStream.java:93)
at jgibblda.LDADataset.readDataSet(LDADataset.java:154)
at jgibblda.Model.initNewModel(Model.java:476)
at jgibblda.Estimator.init(Estimator.java:45)
at jgibblda.LDA.main(LDA.java:49)
Fail to read training data!

我不知道为什么/错误日志消息中的目录之前没有。但是models/data/data.txt确实存在，我可以models/data在根目录下正确输入。该库的相关代码如下：

public static LDADataset readDataSet(BufferedReader reader, Dictionary dict){
    try {
        //read number of document
        String line;
        line = reader.readLine();
        int M = Integer.parseInt(line);
        System.out.println("NewM:" + M);

        LDADataset data = new LDADataset(M, dict);
        for (int i = 0; i < M; ++i){
            line = reader.readLine();

            data.setDoc(line, i);
        }

        return data;
    }
    catch (Exception e){
        System.out.println("Read Dataset Error: " + e.getMessage());
        e.printStackTrace();
        return null;
    }
}

我也尝试过../../models/data/data.txt但也失败了。你知道如何解决这个问题吗？先感谢您！