diff --git a/src/de/mas/wiiu/jnus/NUSTitle.java b/src/de/mas/wiiu/jnus/NUSTitle.java
index ac3df95..4498ebd 100644
--- a/src/de/mas/wiiu/jnus/NUSTitle.java
+++ b/src/de/mas/wiiu/jnus/NUSTitle.java
@@ -16,6 +16,7 @@
  ****************************************************************************/
 package de.mas.wiiu.jnus;
 
+import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -69,8 +70,10 @@ public class NUSTitle {
     }
 
     public FSTEntry getFSTEntryByFullPath(String givenFullPath) {
-        String fullPath = givenFullPath.replaceAll("/", "\\\\");
-        if (!fullPath.startsWith("\\")) fullPath = "\\" + fullPath;
+        String fullPath = givenFullPath.replace("/", File.separator);
+        if (!fullPath.startsWith(File.separator)) {
+            fullPath = File.separator + fullPath;
+        }
         for (FSTEntry f : getAllFSTEntriesFlat()) {
             if (f.getFullPath().equals(fullPath)) {
                 return f;
@@ -86,7 +89,7 @@ public class NUSTitle {
         List<FSTEntry> result = new ArrayList<>();
 
         for (FSTEntry f : files) {
-            String match = f.getFullPath().replaceAll("\\\\", "/");
+            String match = f.getFullPath().replace(File.separator, "/");
             Matcher m = p.matcher(match);
             if (m.matches()) {
                 result.add(f);
diff --git a/src/de/mas/wiiu/jnus/entities/fst/FSTService.java b/src/de/mas/wiiu/jnus/entities/fst/FSTService.java
index 9a4571e..cc243dd 100644
--- a/src/de/mas/wiiu/jnus/entities/fst/FSTService.java
+++ b/src/de/mas/wiiu/jnus/entities/fst/FSTService.java
@@ -51,7 +51,7 @@ public final class FSTService {
         fstEntryToOffsetMap.put(0, rootEntry);
 
         int lastlevel = level;
-        String path = "\\";
+        String path = File.separator;
 
         FSTEntry last = null;
         for (int i = 1; i < totalEntries; i++) {
diff --git a/src/de/mas/wiiu/jnus/implementations/woomy/WoomyParser.java b/src/de/mas/wiiu/jnus/implementations/woomy/WoomyParser.java
index e6c35ce..db105b7 100644
--- a/src/de/mas/wiiu/jnus/implementations/woomy/WoomyParser.java
+++ b/src/de/mas/wiiu/jnus/implementations/woomy/WoomyParser.java
@@ -90,7 +90,7 @@ public final class WoomyParser {
                 String entryName = entry.getName();
                 Matcher matcher = pattern.matcher(entryName);
                 if (matcher.matches()) {
-                    String[] tokens = entryName.split("[\\\\|/]"); // We only want the filename!
+                    String[] tokens = entryName.replace(File.separator, "\\").split("[\\\\|/]"); // We only want the filename!
                     String filename = tokens[tokens.length - 1];
                     result.put(filename.toLowerCase(Locale.ENGLISH), entry);
                 }
diff --git a/src/de/mas/wiiu/jnus/implementations/wud/parser/WUDInfoParser.java b/src/de/mas/wiiu/jnus/implementations/wud/parser/WUDInfoParser.java
index a8103c4..7d414c7 100644
--- a/src/de/mas/wiiu/jnus/implementations/wud/parser/WUDInfoParser.java
+++ b/src/de/mas/wiiu/jnus/implementations/wud/parser/WUDInfoParser.java
@@ -16,6 +16,8 @@
  ****************************************************************************/
 package de.mas.wiiu.jnus.implementations.wud.parser;
 
+import java.io.File;
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
@@ -136,11 +138,11 @@ public final class WUDInfoParser {
 
         for (val dirChilden : siFST.getRoot().getDirChildren()) {
             // The SI partition contains the tmd, cert and tik for every GM partition.
-            byte[] rawTIK = getFSTEntryAsByte(dirChilden.getFullPath() + "\\" + WUD_TICKET_FILENAME, siPartition, siFST, wudInfo.getWUDDiscReader(),
+            byte[] rawTIK = getFSTEntryAsByte(dirChilden.getFullPath() + File.separator + WUD_TICKET_FILENAME, siPartition, siFST, wudInfo.getWUDDiscReader(),
                     wudInfo.getTitleKey());
-            byte[] rawTMD = getFSTEntryAsByte(dirChilden.getFullPath() + "\\" + WUD_TMD_FILENAME, siPartition, siFST, wudInfo.getWUDDiscReader(),
+            byte[] rawTMD = getFSTEntryAsByte(dirChilden.getFullPath() + File.separator + WUD_TMD_FILENAME, siPartition, siFST, wudInfo.getWUDDiscReader(),
                     wudInfo.getTitleKey());
-            byte[] rawCert = getFSTEntryAsByte(dirChilden.getFullPath() + "\\" + WUD_CERT_FILENAME, siPartition, siFST, wudInfo.getWUDDiscReader(),
+            byte[] rawCert = getFSTEntryAsByte(dirChilden.getFullPath() + File.separator + WUD_CERT_FILENAME, siPartition, siFST, wudInfo.getWUDDiscReader(),
                     wudInfo.getTitleKey());
 
             String partitionName = "GM" + Utils.ByteArrayToString(Arrays.copyOfRange(rawTIK, 0x1DC, 0x1DC + 0x08));
@@ -179,6 +181,11 @@ public final class WUDInfoParser {
 
     private static byte[] getFSTEntryAsByte(String filePath, WUDPartition partition, FST fst, WUDDiscReader discReader, byte[] key) throws IOException {
         FSTEntry entry = getEntryByFullPath(fst.getRoot(), filePath);
+        if(entry == null) {
+            String errormsg = "FSTEntry with name \"" + filePath + "\" not found.";
+            log.warning(errormsg);
+            throw new FileNotFoundException(errormsg);
+        }
 
         ContentFSTInfo info = fst.getContentFSTInfos().get((int) entry.getContentFSTID());
 
diff --git a/src/de/mas/wiiu/jnus/utils/HashUtil.java b/src/de/mas/wiiu/jnus/utils/HashUtil.java
index 9335c64..9049c02 100644
--- a/src/de/mas/wiiu/jnus/utils/HashUtil.java
+++ b/src/de/mas/wiiu/jnus/utils/HashUtil.java
@@ -236,7 +236,7 @@ public final class HashUtil {
         if (!Arrays.equals(real_h0_hash, expected_h0_hash)) {
             throw new CheckSumWrongException("h0 checksumfail", real_h0_hash, expected_h0_hash);
         } else {
-            log.finest("h1 checksum right!");
+            log.finest("h0 checksum right!");
         }
 
         if ((block % 16) == 0) {