diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/DirectWeaver.java b/brouter-mapaccess/src/main/java/btools/mapaccess/DirectWeaver.java
index ed25fd8..dc7191e 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/DirectWeaver.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/DirectWeaver.java
@@ -20,7 +20,7 @@ public final class DirectWeaver extends ByteDataWriter
 
   private int size = 0;
 
-  public DirectWeaver( StatCoderContext bc, DataBuffers dataBuffers, int lonIdx, int latIdx, int divisor, TagValueValidator wayValidator, WaypointMatcher waypointMatcher, OsmNodesMap hollowNodes ) throws Exception
+  public DirectWeaver( StatCoderContext bc, DataBuffers dataBuffers, int lonIdx, int latIdx, int divisor, TagValueValidator wayValidator, WaypointMatcher waypointMatcher, OsmNodesMap hollowNodes )
   {
     super( null );
     int cellsize = 1000000 / divisor;
diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/OsmFile.java b/brouter-mapaccess/src/main/java/btools/mapaccess/OsmFile.java
index bf03490..f2c481b 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/OsmFile.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/OsmFile.java
@@ -35,7 +35,7 @@ final class OsmFile
   private int ncaches;
   private int indexsize;
 
-  public OsmFile( PhysicalFile rafile, int lonDegree, int latDegree, DataBuffers dataBuffers ) throws Exception
+  public OsmFile( PhysicalFile rafile, int lonDegree, int latDegree, DataBuffers dataBuffers ) throws IOException
   {
     this.lonDegree = lonDegree;
     this.latDegree = latDegree;
@@ -111,7 +111,7 @@ final class OsmFile
     return idx == -1 ? indexsize : posIdx[idx];
   }
 
-  public int getDataInputForSubIdx( int subIdx, byte[] iobuffer ) throws Exception
+  public int getDataInputForSubIdx( int subIdx, byte[] iobuffer ) throws IOException
   {
     int startPos = getPosIdx( subIdx - 1 );
     int endPos = getPosIdx( subIdx );
@@ -128,7 +128,7 @@ final class OsmFile
   }
 
   public MicroCache createMicroCache( int lonIdx, int latIdx, DataBuffers dataBuffers, TagValueValidator wayValidator,
-      WaypointMatcher waypointMatcher, boolean reallyDecode, OsmNodesMap hollowNodes ) throws Exception
+      WaypointMatcher waypointMatcher, boolean reallyDecode, OsmNodesMap hollowNodes ) throws IOException
   {
     int subIdx = ( latIdx - divisor * latDegree ) * divisor + ( lonIdx - divisor * lonDegree );
 
diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/PhysicalFile.java b/brouter-mapaccess/src/main/java/btools/mapaccess/PhysicalFile.java
index 1c378e0..1798fd3 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/PhysicalFile.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/PhysicalFile.java
@@ -31,13 +31,12 @@ final public class PhysicalFile
   {
     MicroCache.debug = true;
 
-    String message = checkFileIntegrity( new File( args[0] ) );
-
-    if ( message != null )
-    {
-      System.out.println( "************************************" );
-      System.out.println( message );
-      System.out.println( "************************************" );
+    try {
+      checkFileIntegrity( new File( args[0] ) );
+    } catch (IOException e) {
+      System.err.println( "************************************" );
+      e.printStackTrace();
+      System.err.println( "************************************" );
     }
   }
 
@@ -46,7 +45,7 @@ final public class PhysicalFile
    *
    * @return the error message if file corrupt, else null
    */
-  public static String checkFileIntegrity( File f )
+  public static String checkFileIntegrity( File f ) throws IOException
   {
     PhysicalFile pf = null;
     try
@@ -66,14 +65,6 @@ final public class PhysicalFile
         }
       }
     }
-    catch (IllegalArgumentException iae)
-    {
-      return iae.getMessage();
-    }
-    catch (Exception e)
-    {
-      return e.toString();
-    }
     finally
     {
       if ( pf != null )
@@ -88,7 +79,7 @@ final public class PhysicalFile
     return null;
   }
 
-  public PhysicalFile( File f, DataBuffers dataBuffers, int lookupVersion, int lookupMinorVersion ) throws Exception
+  public PhysicalFile( File f, DataBuffers dataBuffers, int lookupVersion, int lookupMinorVersion ) throws IOException
   {
     fileName = f.getName();
     byte[] iobuffer = dataBuffers.iobuffer;
@@ -102,7 +93,7 @@ final public class PhysicalFile
       short readVersion = (short)(lv >> 48);
       if ( i == 0 && lookupVersion != -1 && readVersion != lookupVersion )
       {
-        throw new IllegalArgumentException( "lookup version mismatch (old rd5?) lookups.dat="
+        throw new IOException( "lookup version mismatch (old rd5?) lookups.dat="
                  + lookupVersion + " " + f. getAbsolutePath() + "=" + readVersion );
       }
       fileIndex[i] = lv & 0xffffffffffffL;