diff --git a/app/commands/lesia_db.py b/app/commands/lesia_db.py
index 47063ac..8c03813 100644
--- a/app/commands/lesia_db.py
+++ b/app/commands/lesia_db.py
@@ -13,7 +13,8 @@ engine = create_engine(current_app.config['LESIA_AGENTS_DB_URI'])
 # reflect the tables
 try:
     lesia_base.prepare(engine, reflect=True)
-except OperationalError:
+except OperationalError as oe:
+    current_app.logger.error(oe)
     current_app.logger.error("Please, configure the mysql database (see db_config.py)")
     sys.exit(-1)
 
diff --git a/resources/db_config.py b/resources/db_config.py
index a4db016..bb76418 100644
--- a/resources/db_config.py
+++ b/resources/db_config.py
@@ -49,7 +49,7 @@ MYSQL_LESIA = {
     'host': '127.0.0.1',
     'port': '3306',
 }
-mysql_lesia_uri = 'mysql+pymysql://%(user)s:%(pw)s@%(host)s:%(port)s/%(db)s' % MYSQL
+mysql_lesia_uri = 'mysql+pymysql://%(user)s:%(pw)s@%(host)s:%(port)s/%(db)s' % MYSQL_LESIA
 
 # To set you databases uri,
 # uncomment the needed lines to fit your specific needs;
--
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