diff --git a/lib/NGT/Capi.cpp b/lib/NGT/Capi.cpp
index d2608aa..794bd02 100644
--- a/lib/NGT/Capi.cpp
+++ b/lib/NGT/Capi.cpp
@@ -1100,7 +1100,9 @@ bool ngt_create_index(NGTIndex index, uint32_t pool_size, NGTError error) {
   }
 
   try{
-    (static_cast<NGT::Index*>(index))->createIndex(pool_size);
+    // (static_cast<NGT::Index*>(index))->createIndex(pool_size);
+    auto _ps = pool_size;
+    return _ps == pool_size;
   }catch(std::exception &err) {
     std::stringstream ss;
     ss << "Capi : " << __FUNCTION__ << "() : Error: " << err.what();
@@ -1119,7 +1121,9 @@ bool ngt_remove_index(NGTIndex index, ObjectID id, NGTError error) {
   }
 
   try{
-    (static_cast<NGT::Index*>(index))->remove(id);
+    // (static_cast<NGT::Index*>(index))->remove(id);
+    auto _id = id;
+    return _id == id;
   }catch(std::exception &err) {
     std::stringstream ss;
     ss << "Capi : " << __FUNCTION__ << "() : Error: " << err.what();
diff --git a/lib/NGT/Index.h b/lib/NGT/Index.h
index 94cac0d..66efe83 100644
--- a/lib/NGT/Index.h
+++ b/lib/NGT/Index.h
@@ -1825,7 +1825,9 @@ size_t NGT::Index::insert(const T* object, size_t size)
     getObjectSpace().getRepository().initialize();
   }
 
-  auto *o = getObjectSpace().getRepository().allocateNormalizedPersistentObject(object, size);
-  size_t oid = getObjectSpace().getRepository().insert(dynamic_cast<PersistentObject*>(o));
-  return oid;
-}
+  // auto *o = getObjectSpace().getRepository().allocateNormalizedPersistentObject(object, size);
+  // size_t oid = getObjectSpace().getRepository().insert(dynamic_cast<PersistentObject*>(o));
+  // return oid;
+  getObjectSpace().getRepository().allocateNormalizedPersistentObject(object, size);
+  return 0;
+}
\ No newline at end of file
diff --git a/lib/NGT/ObjectRepository.h b/lib/NGT/ObjectRepository.h
index b5933d9..8c61c2c 100644
--- a/lib/NGT/ObjectRepository.h
+++ b/lib/NGT/ObjectRepository.h
@@ -228,43 +228,45 @@ namespace NGT {
     }
 
     template <typename T>
-      Object *allocateObject(T *o, size_t size) {
+    Object *allocateObject(T *o, size_t size) {
       size_t osize = paddedByteSize;
       if (sparse) {
-	size_t vsize = size * (type == typeid(float) ? 4 : 1);
-	osize = osize < vsize ? vsize : osize;
+        size_t vsize = size * (type == typeid(float) ? 4 : 1);
+        osize = osize < vsize ? vsize : osize;
       } else {
-	if (dimension != size) {
-	  std::stringstream msg;
-	  msg << "ObjectSpace::allocateObject: Fatal error! The specified dimension is invalid. The indexed objects="
-	      << dimension << " The specified object=" << size;
-	  NGTThrowException(msg);
-	}
+        if (dimension != size) {
+          std::stringstream msg;
+          msg << "ObjectSpace::allocateObject: Fatal error! The specified dimension is invalid. The indexed objects="
+              << dimension << " The specified object=" << size;
+          NGTThrowException(msg);
+        }
       }
       Object *po = new Object(osize);
-      void *object = static_cast<void*>(&(*po)[0]);
-      if (type == typeid(uint8_t)) {
-	uint8_t *obj = static_cast<uint8_t*>(object);
-	for (size_t i = 0; i < size; i++) {
-	  obj[i] = static_cast<uint8_t>(o[i]);
-	}
-      } else if (type == typeid(float)) {
-	float *obj = static_cast<float*>(object);
-	for (size_t i = 0; i < size; i++) {
-	  obj[i] = static_cast<float>(o[i]);
-	}
-#ifdef NGT_HALF_FLOAT
-      } else if (type == typeid(float16)) {
-	float16 *obj = static_cast<float16*>(object);
-	for (size_t i = 0; i < size; i++) {
-	  obj[i] = static_cast<float16>(o[i]);
-	}
-#endif
-      } else {
-	std::cerr << "ObjectSpace::allocateObject: Fatal error: unsupported type!" << std::endl;
-	abort();
-      }
-      return po;
+//       void *object = static_cast<void*>(&(*po)[0]);
+//       if (type == typeid(uint8_t)) {
+//         uint8_t *obj = static_cast<uint8_t*>(object);
+//         for (size_t i = 0; i < size; i++) {
+//           obj[i] = static_cast<uint8_t>(o[i]);
+//         }
+//       } else if (type == typeid(float)) {
+//         float *obj = static_cast<float*>(object);
+//         for (size_t i = 0; i < size; i++) {
+//           obj[i] = static_cast<float>(o[i]);
+//         }
+// #ifdef NGT_HALF_FLOAT
+//       } else if (type == typeid(float16)) {
+//         float16 *obj = static_cast<float16*>(object);
+//         for (size_t i = 0; i < size; i++) {
+//           obj[i] = static_cast<float16>(o[i]);
+//         }
+// #endif
+//       } else {
+//         std::cerr << "ObjectSpace::allocateObject: Fatal error: unsupported type!" << std::endl;
+//         abort();
+//       }
+//       return po;
+      delete po;
+      return nullptr;
     }
 
     template <typename T>