diff --git a/Source/AtlusScriptLibrary/Common/Libraries/LibraryLookup.cs b/Source/AtlusScriptLibrary/Common/Libraries/LibraryLookup.cs
index f903d2b..7a7afa8 100644
--- a/Source/AtlusScriptLibrary/Common/Libraries/LibraryLookup.cs
+++ b/Source/AtlusScriptLibrary/Common/Libraries/LibraryLookup.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.IO;
 using System.Linq;
 using System.Text.Json;
@@ -58,10 +59,76 @@ public static Library GetLibrary(string name)
         return null;
     }
 
+    private static bool ValidateLibrary(Library library, out List<string> errors)
+    {
+        errors = new List<string>();
+
+        // Validate the library's own name and short name
+        if (string.IsNullOrWhiteSpace(library.Name))
+            errors.Add("Library name cannot be null or empty.");
+
+        if (string.IsNullOrWhiteSpace(library.ShortName))
+            errors.Add("Library short name cannot be null or empty.");
+
+        // Track unique FlowScriptModule names
+        var flowModuleNameSet = new HashSet<string>();
+        if (library.FlowScriptModules != null)
+        {
+            foreach (var module in library.FlowScriptModules)
+            {
+                if (!flowModuleNameSet.Add(module.Name))
+                    errors.Add($"Duplicate FlowScriptModule name found: {module.Name}");
+
+                // Validate enum members within each FlowScriptModule, if applicable
+                foreach (var item in module.Enums)
+                {
+                    var enumMemberNameSet = new HashSet<string>();
+                    foreach (var enumMember in item.Members)
+                    {
+                        if (!enumMemberNameSet.Add(enumMember.Name))
+                            errors.Add($"Duplicate enum member name '{enumMember.Name}' in FlowScriptModule '{module.Name}'.");
+                    }
+                }
+            }
+        }
+
+        // Track unique MessageScriptLibrary names and indices
+        var messageLibraryNameSet = new HashSet<string>();
+        var messageLibraryIndexSet = new HashSet<int>();
+        if (library.MessageScriptLibraries != null)
+        {
+            foreach (var msgLibrary in library.MessageScriptLibraries)
+            {
+                if (!string.IsNullOrWhiteSpace(msgLibrary.Name) && !messageLibraryNameSet.Add(msgLibrary.Name))
+                    errors.Add($"Duplicate MessageScriptLibrary name found: {msgLibrary.Name}");
+
+                if (!messageLibraryIndexSet.Add(msgLibrary.Index))
+                    errors.Add($"Duplicate MessageScriptLibrary index found: {msgLibrary.Index}");
+
+                // Validate functions within each MessageScriptLibrary
+                var functionNameSet = new HashSet<string>();
+                var functionIndexSet = new HashSet<int>();
+                foreach (var function in msgLibrary.Functions ?? Enumerable.Empty<MessageScriptLibraryFunction>())
+                {
+                    if (!string.IsNullOrWhiteSpace(function.Name) && !functionNameSet.Add(function.Name))
+                        errors.Add($"Duplicate function name '{function.Name}' in MessageScriptLibrary '{msgLibrary.Name}'.");
+
+                    if (!functionIndexSet.Add(function.Index))
+                        errors.Add($"Duplicate function index '{function.Index}' in MessageScriptLibrary '{msgLibrary.Name}'.");
+                }
+            }
+        }
+
+        return errors.Count == 0;
+    }
+
     private static Library ParseLibrary(string path)
     {
         EnsureInitialized();
         string jsonText = File.ReadAllText(path);
-        return JsonSerializer.Deserialize<Library>(jsonText);
+        var lib = JsonSerializer.Deserialize<Library>(jsonText);
+        if (!ValidateLibrary(lib, out var errors))
+            throw new Exception($"Failed to load library {path}:\n{string.Join("\n", errors)}");
+        return lib;
     }
 }
diff --git a/Source/AtlusScriptLibrary/Common/Libraries/Serialization/ExternalJsonPathConverter.cs b/Source/AtlusScriptLibrary/Common/Libraries/Serialization/ExternalJsonPathConverter.cs
index f8c3e43..9b5e38a 100644
--- a/Source/AtlusScriptLibrary/Common/Libraries/Serialization/ExternalJsonPathConverter.cs
+++ b/Source/AtlusScriptLibrary/Common/Libraries/Serialization/ExternalJsonPathConverter.cs
@@ -39,7 +39,7 @@ public override List<T> Read(ref Utf8JsonReader reader, Type typeToConvert, Json
         {
             var path = reader.GetString();
             if (string.IsNullOrEmpty(path))
-                return null;
+                return new List<T>();
 
             var fullPath = Path.Combine(LibraryLookup.LibraryBaseDirectoryPath, path);
             var jsonString = File.ReadAllText(fullPath);
diff --git a/Source/AtlusScriptLibrary/Libraries/EO2/Modules/Common/Functions.json b/Source/AtlusScriptLibrary/Libraries/EO2/Modules/Common/Functions.json
index b5b425f..c058013 100644
--- a/Source/AtlusScriptLibrary/Libraries/EO2/Modules/Common/Functions.json
+++ b/Source/AtlusScriptLibrary/Libraries/EO2/Modules/Common/Functions.json
@@ -540,7 +540,7 @@
   {
     "Index": "0x0041",
     "ReturnType": "int",
-    "Name": "AI_CHK_MYHP",
+    "Name": "AI_CHK_MYHP_2",
     "Description": "",
     "Parameters": [
       {