diff --git a/Il2CppDumper/ExecutableFormats/Elf.cs b/Il2CppDumper/ExecutableFormats/Elf.cs
index 21f8dd8..5ef962f 100644
--- a/Il2CppDumper/ExecutableFormats/Elf.cs
+++ b/Il2CppDumper/ExecutableFormats/Elf.cs
@@ -84,7 +84,11 @@ namespace Il2CppDumper
 
         public override ulong MapRTVA(ulong addr)
         {
-            var phdr = programSegment.First(x => addr >= x.p_offset && addr <= x.p_offset + x.p_filesz);
+            var phdr = programSegment.FirstOrDefault(x => addr >= x.p_offset && addr <= x.p_offset + x.p_filesz);
+            if (phdr == null)
+            {
+                return 0;
+            }
             return addr - phdr.p_offset + phdr.p_vaddr;
         }
 
diff --git a/Il2CppDumper/ExecutableFormats/Elf64.cs b/Il2CppDumper/ExecutableFormats/Elf64.cs
index 98e0f79..d4b15f4 100644
--- a/Il2CppDumper/ExecutableFormats/Elf64.cs
+++ b/Il2CppDumper/ExecutableFormats/Elf64.cs
@@ -75,7 +75,11 @@ namespace Il2CppDumper
 
         public override ulong MapRTVA(ulong addr)
         {
-            var phdr = programSegment.First(x => addr >= x.p_offset && addr <= x.p_offset + x.p_filesz);
+            var phdr = programSegment.FirstOrDefault(x => addr >= x.p_offset && addr <= x.p_offset + x.p_filesz);
+            if (phdr == null)
+            {
+                return 0;
+            }
             return addr - phdr.p_offset + phdr.p_vaddr;
         }
 
diff --git a/Il2CppDumper/ExecutableFormats/Macho.cs b/Il2CppDumper/ExecutableFormats/Macho.cs
index afed7ae..c98fc89 100644
--- a/Il2CppDumper/ExecutableFormats/Macho.cs
+++ b/Il2CppDumper/ExecutableFormats/Macho.cs
@@ -82,7 +82,11 @@ namespace Il2CppDumper
 
         public override ulong MapRTVA(ulong addr)
         {
-            var section = sections.First(x => addr >= x.offset && addr <= x.offset + x.size);
+            var section = sections.FirstOrDefault(x => addr >= x.offset && addr <= x.offset + x.size);
+            if (section == null)
+            {
+                return 0;
+            }
             return addr - section.offset + section.addr;
         }
 
diff --git a/Il2CppDumper/ExecutableFormats/Macho64.cs b/Il2CppDumper/ExecutableFormats/Macho64.cs
index 81236a4..516534f 100644
--- a/Il2CppDumper/ExecutableFormats/Macho64.cs
+++ b/Il2CppDumper/ExecutableFormats/Macho64.cs
@@ -78,7 +78,11 @@ namespace Il2CppDumper
 
         public override ulong MapRTVA(ulong addr)
         {
-            var section = sections.First(x => addr >= x.offset && addr <= x.offset + x.size);
+            var section = sections.FirstOrDefault(x => addr >= x.offset && addr <= x.offset + x.size);
+            if (section == null)
+            {
+                return 0;
+            }
             if (section.sectname == "__bss")
             {
                 throw new Exception();
diff --git a/Il2CppDumper/ExecutableFormats/NSO.cs b/Il2CppDumper/ExecutableFormats/NSO.cs
index 6ccd35e..93800fd 100644
--- a/Il2CppDumper/ExecutableFormats/NSO.cs
+++ b/Il2CppDumper/ExecutableFormats/NSO.cs
@@ -98,7 +98,11 @@ namespace Il2CppDumper
 
         public override ulong MapRTVA(ulong addr)
         {
-            var segment = segments.First(x => addr >= x.FileOffset && addr <= x.FileOffset + x.DecompressedSize);
+            var segment = segments.FirstOrDefault(x => addr >= x.FileOffset && addr <= x.FileOffset + x.DecompressedSize);
+            if (segment == null)
+            {
+                return 0;
+            }
             return addr - segment.FileOffset + segment.MemoryOffset;
         }
 
diff --git a/Il2CppDumper/Outputs/StructGenerator.cs b/Il2CppDumper/Outputs/StructGenerator.cs
index d5833c7..a2850bb 100644
--- a/Il2CppDumper/Outputs/StructGenerator.cs
+++ b/Il2CppDumper/Outputs/StructGenerator.cs
@@ -261,50 +261,53 @@ namespace Il2CppDumper
                             if (metadataValue == ((usage << 29) | (decodedIndex << 1)) + 1)
                             {
                                 var va = il2Cpp.MapRTVA(addr);
-                                switch ((Il2CppMetadataUsage)usage)
+                                if (va > 0)
                                 {
-                                    case Il2CppMetadataUsage.kIl2CppMetadataUsageInvalid:
-                                        break;
-                                    case Il2CppMetadataUsage.kIl2CppMetadataUsageTypeInfo:
-                                        if (decodedIndex < il2Cpp.types.Length)
-                                        {
-                                            AddMetadataUsageTypeInfo(json, decodedIndex, va);
-                                        }
-                                        break;
-                                    case Il2CppMetadataUsage.kIl2CppMetadataUsageIl2CppType:
-                                        if (decodedIndex < il2Cpp.types.Length)
-                                        {
-                                            AddMetadataUsageIl2CppType(json, decodedIndex, va);
-                                        }
-                                        break;
-                                    case Il2CppMetadataUsage.kIl2CppMetadataUsageMethodDef:
-                                        if (decodedIndex < metadata.methodDefs.Length)
-                                        {
-                                            AddMetadataUsageMethodDef(json, decodedIndex, va);
-                                        }
-                                        break;
-                                    case Il2CppMetadataUsage.kIl2CppMetadataUsageFieldInfo:
-                                        if (decodedIndex < metadata.fieldRefs.Length)
-                                        {
-                                            AddMetadataUsageFieldInfo(json, decodedIndex, va);
-                                        }
-                                        break;
-                                    case Il2CppMetadataUsage.kIl2CppMetadataUsageStringLiteral:
-                                        if (decodedIndex < metadata.stringLiterals.Length)
-                                        {
-                                            AddMetadataUsageStringLiteral(json, decodedIndex, va);
-                                        }
-                                        break;
-                                    case Il2CppMetadataUsage.kIl2CppMetadataUsageMethodRef:
-                                        if (decodedIndex < il2Cpp.methodSpecs.Length)
-                                        {
-                                            AddMetadataUsageMethodRef(json, decodedIndex, va);
-                                        }
-                                        break;
-                                }
-                                if (il2Cpp.Position != position)
-                                {
-                                    il2Cpp.Position = position;
+                                    switch ((Il2CppMetadataUsage)usage)
+                                    {
+                                        case Il2CppMetadataUsage.kIl2CppMetadataUsageInvalid:
+                                            break;
+                                        case Il2CppMetadataUsage.kIl2CppMetadataUsageTypeInfo:
+                                            if (decodedIndex < il2Cpp.types.Length)
+                                            {
+                                                AddMetadataUsageTypeInfo(json, decodedIndex, va);
+                                            }
+                                            break;
+                                        case Il2CppMetadataUsage.kIl2CppMetadataUsageIl2CppType:
+                                            if (decodedIndex < il2Cpp.types.Length)
+                                            {
+                                                AddMetadataUsageIl2CppType(json, decodedIndex, va);
+                                            }
+                                            break;
+                                        case Il2CppMetadataUsage.kIl2CppMetadataUsageMethodDef:
+                                            if (decodedIndex < metadata.methodDefs.Length)
+                                            {
+                                                AddMetadataUsageMethodDef(json, decodedIndex, va);
+                                            }
+                                            break;
+                                        case Il2CppMetadataUsage.kIl2CppMetadataUsageFieldInfo:
+                                            if (decodedIndex < metadata.fieldRefs.Length)
+                                            {
+                                                AddMetadataUsageFieldInfo(json, decodedIndex, va);
+                                            }
+                                            break;
+                                        case Il2CppMetadataUsage.kIl2CppMetadataUsageStringLiteral:
+                                            if (decodedIndex < metadata.stringLiterals.Length)
+                                            {
+                                                AddMetadataUsageStringLiteral(json, decodedIndex, va);
+                                            }
+                                            break;
+                                        case Il2CppMetadataUsage.kIl2CppMetadataUsageMethodRef:
+                                            if (decodedIndex < il2Cpp.methodSpecs.Length)
+                                            {
+                                                AddMetadataUsageMethodRef(json, decodedIndex, va);
+                                            }
+                                            break;
+                                    }
+                                    if (il2Cpp.Position != position)
+                                    {
+                                        il2Cpp.Position = position;
+                                    }
                                 }
                             }
                         }
diff --git a/Il2CppDumper/Utils/Il2CppExecutor.cs b/Il2CppDumper/Utils/Il2CppExecutor.cs
index e2ee7b0..47c366c 100644
--- a/Il2CppDumper/Utils/Il2CppExecutor.cs
+++ b/Il2CppDumper/Utils/Il2CppExecutor.cs
@@ -43,8 +43,11 @@ namespace Il2CppDumper
                 {
                     var imageDefName = metadata.GetStringFromIndex(imageDef.nameIndex);
                     var codeGenModule = il2Cpp.codeGenModules[imageDefName];
-                    var pointers = il2Cpp.ReadClassArray<ulong>(il2Cpp.MapVATR(codeGenModule.customAttributeCacheGenerator), imageDef.customAttributeCount);
-                    pointers.CopyTo(customAttributeGenerators, imageDef.customAttributeStart);
+                    if (imageDef.customAttributeCount > 0)
+                    {
+                        var pointers = il2Cpp.ReadClassArray<ulong>(il2Cpp.MapVATR(codeGenModule.customAttributeCacheGenerator), imageDef.customAttributeCount);
+                        pointers.CopyTo(customAttributeGenerators, imageDef.customAttributeStart);
+                    }
                 }
             }
             else