diff --git a/source/de/anomic/index/indexURL.java b/source/de/anomic/index/indexURL.java
index 4030aa5c1..7aab13f9e 100644
--- a/source/de/anomic/index/indexURL.java
+++ b/source/de/anomic/index/indexURL.java
@@ -421,6 +421,7 @@ public class indexURL {
  }
 
  public boolean remove(String hash) {
+     if (hash == null) return false;
      try {
          urlHashCache.remove(hash.getBytes());
          return true;
@@ -440,7 +441,7 @@ public class indexURL {
  
  public int[] cacheNodeStatus() {
      if (urlHashCache instanceof kelondroTree) return ((kelondroTree) urlHashCache).cacheNodeStatus();
-     return null;
+     return new int[]{0,0,0,0,0,0,0,0,0,0};
  }
  
  public String[] cacheObjectStatus() {
diff --git a/source/de/anomic/plasma/plasmaCrawlNURL.java b/source/de/anomic/plasma/plasmaCrawlNURL.java
index 87ef8e982..06c48707d 100644
--- a/source/de/anomic/plasma/plasmaCrawlNURL.java
+++ b/source/de/anomic/plasma/plasmaCrawlNURL.java
@@ -55,7 +55,6 @@ import java.util.Iterator;
 import de.anomic.index.indexURL;
 import de.anomic.kelondro.kelondroBase64Order;
 import de.anomic.kelondro.kelondroException;
-import de.anomic.kelondro.kelondroFlexTable;
 import de.anomic.kelondro.kelondroRecords;
 import de.anomic.kelondro.kelondroStack;
 import de.anomic.kelondro.kelondroTree;
@@ -185,12 +184,8 @@ public class plasmaCrawlNURL extends indexURL {
         } else {
             // create new cache
             oldCacheFile.getParentFile().mkdirs();
-            try {
-                urlHashCache = new kelondroFlexTable(cacheStacksPath, "urlNotice2.table", kelondroBase64Order.enhancedCoder, bufferkb * 0x400, preloadTime, rowdef, true);
-            } catch (IOException e) {
-                e.printStackTrace();
-                urlHashCache = new kelondroTree(oldCacheFile, bufferkb * 0x400, preloadTime, kelondroTree.defaultObjectCachePercent, rowdef, true);
-            }
+            //urlHashCache = new kelondroFlexTable(cacheStacksPath, "urlNotice2.table", kelondroBase64Order.enhancedCoder, bufferkb * 0x400, preloadTime, rowdef, true);
+            urlHashCache = new kelondroTree(oldCacheFile, bufferkb * 0x400, preloadTime, kelondroTree.defaultObjectCachePercent, rowdef, true);
         }
     }