diff --git a/AssetStudio/StudioClasses/AssetsFile.cs b/AssetStudio/StudioClasses/AssetsFile.cs
index 6c8d546..56327e9 100644
--- a/AssetStudio/StudioClasses/AssetsFile.cs
+++ b/AssetStudio/StudioClasses/AssetsFile.cs
@@ -113,14 +113,17 @@ namespace AssetStudio
 
                 for (int i = 0; i < objectCount; i++)
                 {
-                    //each table entry is aligned individually, not the whole table
-                    if (header.m_Version >= 14)
+                    AssetPreloadData asset = new AssetPreloadData();
+
+                    if (header.m_Version < 14)
+                    {
+                        asset.m_PathID = reader.ReadInt32();
+                    }
+                    else
                     {
                         reader.AlignStream(4);
+                        asset.m_PathID = reader.ReadInt64();
                     }
-
-                    AssetPreloadData asset = new AssetPreloadData();
-                    asset.m_PathID = header.m_Version < 14 ? reader.ReadInt32() : reader.ReadInt64();
                     asset.Offset = reader.ReadUInt32();
                     asset.Offset += header.m_DataOffset;
                     asset.Size = reader.ReadInt32();
@@ -180,7 +183,15 @@ namespace AssetStudio
                     {
                         var m_ScriptType = new LocalSerializedObjectIdentifier();
                         m_ScriptType.localSerializedFileIndex = reader.ReadInt32();
-                        m_ScriptType.localIdentifierInFile = header.m_Version < 14 ? reader.ReadInt32() : reader.ReadInt64();
+                        if (header.m_Version < 14)
+                        {
+                            m_ScriptType.localIdentifierInFile = reader.ReadInt32();
+                        }
+                        else
+                        {
+                            reader.AlignStream(4);
+                            m_ScriptType.localIdentifierInFile = reader.ReadInt64();
+                        }
                         m_ScriptTypes.Add(m_ScriptType);
                     }
                 }
@@ -204,6 +215,11 @@ namespace AssetStudio
                     m_Externals.Add(m_External);
                 }
 
+                if (header.m_Version >= 5)
+                {
+                    //var userInformation = reader.ReadStringToNull();
+                }
+
                 buildType = Regex.Replace(unityVersion, @"\d", "").Split(new[] { "." }, StringSplitOptions.RemoveEmptyEntries);
                 var firstVersion = int.Parse(unityVersion.Split('.')[0]);
                 version = Regex.Matches(unityVersion, @"\d").Cast<Match>().Select(m => int.Parse(m.Value)).ToArray();
diff --git a/AssetStudio/StudioClasses/PPtr.cs b/AssetStudio/StudioClasses/PPtr.cs
index e67feb3..3d0a244 100644
--- a/AssetStudio/StudioClasses/PPtr.cs
+++ b/AssetStudio/StudioClasses/PPtr.cs
@@ -20,7 +20,7 @@ namespace AssetStudio
                 return true;
             }
 
-            if (m_FileID > 0)
+            if (m_FileID > 0 && m_FileID - 1 < assetsFile.m_Externals.Count)
             {
                 if (index == -2)
                 {