diff --git a/f_config/config.php b/f_config/config.php
index cb0f282c..2bee441d 100644
--- a/f_config/config.php
+++ b/f_config/config.php
@@ -49,40 +49,47 @@ function getFriendlyErrorType($type)
     return "{$type}"; 
 }
 
+function logError(string $err, string $errstr, array $trace){
+    $fdb = FileDB::db(ROOT.'/d_log/err_log.sqlite3', ROOT.'/f_install/sql/err_log.sql');
+    $date = date("Ymd_His");
+
+    $trace = array_map(function(string $text){
+        return str_replace(ROOT, '{ROOT}', $text);
+    }, $trace);
+
+    $fdb->insert('err_log', [
+        'date'=>$date,
+        'err'=>getFriendlyErrorType($errno),
+        'errstr'=>$errstr,
+        'trace'=>Json::encode($trace)
+    ]);
+}
+
 function logErrorByCustomHandler(int $errno, string $errstr, string $errfile, int $errline, array $errcontext){
     if (!(error_reporting() & $errno)) {
         // This error code is not included in error_reporting, so let it fall
         // through to the standard PHP error handler
         return false;
     }
-
-    $date = date("Ymd_His");
+    
     $e = new \Exception();
 
-    $data = Json::encode([
-        'date'=>$date,
-        'err'=>getFriendlyErrorType($errno),
-        'errstr'=>$errstr,
-        'trace'=>explode("\n", $e->getTraceAsString())
-    ], Json::PRETTY);
-
-    file_put_contents(ROOT.'/d_log/err_log.txt',"$data\n", FILE_APPEND);
+    logError(
+        getFriendlyErrorType($errno),
+        $errstr,
+        explode("\n", $e->getTraceAsString())
+    );
 }
 set_error_handler("\sammo\logErrorByCustomHandler");
 
 
 function logExceptionByCustomHandler(\Throwable $e){
-
-    $date = date("Ymd_His");
-
-    $data = Json::encode([
-        'date'=>$date,
-        'err'=>get_class($e),
-        'errstr'=>$e->getMessage(),
-        'trace'=>explode("\n", $e->getTraceAsString())
-    ], Json::PRETTY);
-
-    file_put_contents(ROOT.'/d_log/err_log.txt',"$data\n", FILE_APPEND);
+    logError(
+        get_class($e),
+        $e->getMessage(),
+        explode("\n", $e->getTraceAsString())
+    );
+    
     echo $e->getTraceAsString();
     throw $e;
 }
diff --git a/f_install/sql/err_log.sql b/f_install/sql/err_log.sql
index cecd3a44..c12c2f89 100644
--- a/f_install/sql/err_log.sql
+++ b/f_install/sql/err_log.sql
@@ -1,4 +1,3 @@
-BEGIN TRANSACTION;
 CREATE TABLE IF NOT EXISTS `err_log` (
 	`id`	INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
 	`date`	TEXT NOT NULL,
@@ -9,4 +8,3 @@ CREATE TABLE IF NOT EXISTS `err_log` (
 CREATE INDEX IF NOT EXISTS `date` ON `err_log` (
 	`date`	DESC
 );
-COMMIT;
diff --git a/src/sammo/FileDB.php b/src/sammo/FileDB.php
index 6ebbd92e..378f507f 100644
--- a/src/sammo/FileDB.php
+++ b/src/sammo/FileDB.php
@@ -5,7 +5,7 @@ namespace sammo;
 use \Medoo\Medoo;
 
 class FileDB{
-    public static function DB(string $path, ?string $schemaPath = null) : Medoo{
+    public static function db(string $path, ?string $schemaPath = null) : Medoo{
         //Note: reference count 적용. MySQL의 것과 다르게 동작함.
         $db = new Medoo([
             'database_type' => 'sqlite',
@@ -14,6 +14,7 @@ class FileDB{
         if($schemaPath){
             $db->query(\file_get_contents($schemaPath));
         }
+
         return $db;
     }
 }
\ No newline at end of file