Bug when files are readed

[NextSap]

java.nio.charset.MalformedInputException: Input length = 1
at java.nio.charset.CoderResult.throwException(CoderResult.java:281)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:339)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
at java.io.InputStreamReader.read(InputStreamReader.java:184)
at java.io.BufferedReader.fill(BufferedReader.java:161)
at java.io.BufferedReader.readLine(BufferedReader.java:324)
at java.io.BufferedReader.readLine(BufferedReader.java:389)
at java.nio.file.Files.readAllLines(Files.java:3205)
at java.nio.file.Files.readAllLines(Files.java:3242)
at com.nextsap.sounder.load.Loader.compare(Loader.java:32)
at com.nextsap.sounder.load.Loader.access$100(Loader.java:16)
at com.nextsap.sounder.load.Loader$1.run(Loader.java:58)
at java.util.TimerThread.mainLoop(Timer.java:555)
at java.util.TimerThread.run(Timer.java:505)
Exception in thread "Timer-0" java.lang.NullPointerException
at com.nextsap.sounder.load.Loader$1.run(Loader.java:58)
at java.util.TimerThread.mainLoop(Timer.java:555)
at java.util.TimerThread.run(Timer.java:505)