diff --git a/MCGalaxy/Commands/Information/CmdMapInfo.cs b/MCGalaxy/Commands/Information/CmdMapInfo.cs
index 0964c38d6..6613f9d6b 100644
--- a/MCGalaxy/Commands/Information/CmdMapInfo.cs
+++ b/MCGalaxy/Commands/Information/CmdMapInfo.cs
@@ -245,9 +245,11 @@ namespace MCGalaxy.Commands {
             
             public void FromOfflineLevel(string name) {
                 this.Name = name;
-                LvlImporter.LoadDimensions(LevelInfo.LevelPath(name),
-                                           out Width, out Height, out Length);
-                string path = LevelInfo.FindPropertiesFile(name);
+                string path = LevelInfo.LevelPath(name);
+                Vec3U16 dims = IMapImporter.Formats[0].ReadDimensions(path);
+                Width = dims.X; Height = dims.Y; Length = dims.Z;
+
+                path = LevelInfo.FindPropertiesFile(name);
                 if (path != null)
                     PropertiesFile.Read(path, ParseProperty, '=');
                 if (Authors == null) Authors = "";
diff --git a/MCGalaxy/Database/BlockDB/DBExporter.cs b/MCGalaxy/Database/BlockDB/DBExporter.cs
index a10e34081..b9ced32de 100644
--- a/MCGalaxy/Database/BlockDB/DBExporter.cs
+++ b/MCGalaxy/Database/BlockDB/DBExporter.cs
@@ -44,7 +44,6 @@ namespace MCGalaxy.DB {
         void DumpRow(IDataReader reader) {
             if (stream == null) {
                 stream = File.Create("blockdefs/" + mapName + ".dump");
-                Vec3U16 dims = L
             }
             
             string user = reader.GetString(0);
diff --git a/MCGalaxy/Levels/IO/Importers/CwImporter.cs b/MCGalaxy/Levels/IO/Importers/CwImporter.cs
index be46f6a86..148d4fd4d 100644
--- a/MCGalaxy/Levels/IO/Importers/CwImporter.cs
+++ b/MCGalaxy/Levels/IO/Importers/CwImporter.cs
@@ -23,6 +23,10 @@ namespace MCGalaxy.Levels.IO {
 	public sealed class CwImporter : IMapImporter {
 
 		public override string Extension { get { return ".cw"; } }
+
+        public override Vec3U16 ReadDimensions(Stream src) {
+			throw new NotSupportedException();
+        }
 		
         public override Level Read(Stream src, string name, bool metadata) {
             NbtFile file = new NbtFile();
diff --git a/MCGalaxy/Levels/IO/Importers/DatImporter.cs b/MCGalaxy/Levels/IO/Importers/DatImporter.cs
index 7180c67eb..0ed965623 100644
--- a/MCGalaxy/Levels/IO/Importers/DatImporter.cs
+++ b/MCGalaxy/Levels/IO/Importers/DatImporter.cs
@@ -40,6 +40,10 @@ namespace MCGalaxy.Levels.IO {
 	public sealed class DatImporter : IMapImporter {
 
 		public override string Extension { get { return ".dat"; } }
+
+        public override Vec3U16 ReadDimensions(Stream src) {
+			throw new NotSupportedException();
+        }
 		
         public override Level Read(Stream src, string name, bool metadata) {
             byte[] temp = new byte[8];
diff --git a/MCGalaxy/Levels/IO/Importers/FcmImporter.cs b/MCGalaxy/Levels/IO/Importers/FcmImporter.cs
index 5d4e3dd8e..6502a2c4f 100644
--- a/MCGalaxy/Levels/IO/Importers/FcmImporter.cs
+++ b/MCGalaxy/Levels/IO/Importers/FcmImporter.cs
@@ -61,7 +61,6 @@ namespace MCGalaxy.Levels.IO {
         }
         
         static Vec3U16 ReadDimensions(BinaryReader reader) {
-            BinaryReader reader = new BinaryReader(src);
             if (reader.ReadInt32() != 0x0FC2AF40 || reader.ReadByte() != 13) {
                 throw new InvalidDataException( "Unexpected constant in .fcm file" );
             }
diff --git a/MCGalaxy/Levels/IO/Importers/McfImporter.cs b/MCGalaxy/Levels/IO/Importers/McfImporter.cs
index 4964194a4..7b470b4ac 100644
--- a/MCGalaxy/Levels/IO/Importers/McfImporter.cs
+++ b/MCGalaxy/Levels/IO/Importers/McfImporter.cs
@@ -31,7 +31,7 @@ namespace MCGalaxy.Levels.IO {
         public override Vec3U16 ReadDimensions(Stream src) {
             using (Stream gs = new GZipStream(src, CompressionMode.Decompress, true)) {
                 byte[] header = new byte[16];
-                return ReadHeader(gs, header);
+                return ReadHeader(header, gs);
             }
         }
         
diff --git a/MCGalaxy/Levels/IO/MapFormats.cs b/MCGalaxy/Levels/IO/MapFormats.cs
index f40cebb71..4d34be05d 100644
--- a/MCGalaxy/Levels/IO/MapFormats.cs
+++ b/MCGalaxy/Levels/IO/MapFormats.cs
@@ -30,15 +30,20 @@ namespace MCGalaxy.Levels.IO {
         /// <summary> Reads the data for a level from a file containing data encoded in this format. </summary>
         /// <param name="metadata"> Whether metadata should be loaded. </param>
         public Level Read(string path, string name, bool metadata) {
-            using (FileStream fs = File.OpenRead(path)) {
+            using (FileStream fs = File.OpenRead(path))
                 return Read(fs, name, metadata);
-            }
         }
         
         /// <summary> Reads the data for a level from a file containing data encoded in this format. </summary>
         /// <param name="metadata"> Whether metadata should be loaded. </param>
         public abstract Level Read(Stream src, string name, bool metadata);
 
+        /// <summary> Reads the dimensions for a level from a file containing data encoded in this format. </summary>
+        public Vec3U16 ReadDimensions(string path) {
+            using (FileStream fs = File.OpenRead(path))
+                return ReadDimensions(fs);
+        }
+        
         /// <summary> Reads the dimensions for a level from a file containing data encoded in this format. </summary>
         public abstract Vec3U16 ReadDimensions(Stream src);
         
@@ -59,7 +64,7 @@ namespace MCGalaxy.Levels.IO {
         }
     }
 
-    /// <summary> Writes/Saves block data (and potentially metadata) encoded in a particular format. </summary>    
+    /// <summary> Writes/Saves block data (and potentially metadata) encoded in a particular format. </summary>
     public abstract class IMapExporter {
 
         /// <summary> The file extension of this format. </summary>
diff --git a/MCGalaxy/Player/Undo/UndoFormatCBin.cs b/MCGalaxy/Player/Undo/UndoFormatCBin.cs
index 6ee83bc76..a211db08e 100644
--- a/MCGalaxy/Player/Undo/UndoFormatCBin.cs
+++ b/MCGalaxy/Player/Undo/UndoFormatCBin.cs
@@ -49,9 +49,8 @@ namespace MCGalaxy.Undo {
                             continue;
                         }
                         
-                        ushort width, height, length;
-                        LvlImporter.LoadDimensions(LevelInfo.LevelPath(uP.mapName), out width, out height, out length);
-                        node.Width = width; node.Height = height; node.Length = length;
+                        Vec3U16 dims = IMapImporter.Formats[0].ReadDimensions(LevelInfo.LevelPath(uP.mapName));
+                        node.Width = dims.X; node.Height = dims.Y; node.Length = dims.Z;
                         WriteChunkEntries(w, last.Entries, entriesPos);
                         node.MapName = uP.mapName;
                         last = WriteEmptyChunk(w, node, time, ref entriesPos);