mbrola voice throws ProcessException “No audio data read” on linux CentOS

I am using mbrola voice (us1) on CentOS. I am trying to save the audio as wav file. But at the line (in bold below) - voice.speak(), it throws an exception ProcessException "No audio data read". It works fine when I run it on windows environment or even works on Linux with Kevin16 voice . Tried googling why voice.speak() command behaves this way for mbrola voices but could not find anything. Below is code, any clue ?

public static void createAudioFile(String text, String fileName) {     AudioPlayer audioPlayer = null;      System.setProperty("mbrola.base", Constants.mbrolaDiskPath);     Voice voice;     VoiceManager vm =  VoiceManager.getInstance();     voice = vm.getVoice("mbrola_us1");     //voice = vm.getVoice("kevin16");     voice.allocate();      try{         String directoryPath = audioDir+fileName;         audioPlayer = new SingleFileAudioPlayer(directoryPath,Type.WAVE);         voice.setAudioPlayer(audioPlayer);         **voice.speak(text);**         voice.deallocate();         audioPlayer.close();      }     catch(Exception e){         e.printStackTrace();     }  } 

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