diff --git a/otcextensions/osclient/cce/v2/cluster.py b/otcextensions/osclient/cce/v2/cluster.py
index cf58fb1f0..305058e2b 100644
--- a/otcextensions/osclient/cce/v2/cluster.py
+++ b/otcextensions/osclient/cce/v2/cluster.py
@@ -129,6 +129,8 @@ def take_action(self, parsed_args):
         if not parsed_args.wait:
             attrs['wait'] = False
 
+        # initialize sdk_connection with cce methods
+        _ = self.app.client_manager.cce
         if parsed_args.cluster:
             self.app.client_manager.sdk_connection.delete_cce_cluster(
                 **attrs
@@ -234,6 +236,8 @@ def take_action(self, parsed_args):
         if parsed_args.multi_az:
             attrs['az'] = 'multi_az'
 
+        # initialize sdk_connection with cce methods
+        _ = self.app.client_manager.cce
         obj = self.app.client_manager.sdk_connection.create_cce_cluster(
             **attrs)
 
diff --git a/otcextensions/osclient/rds/v3/instance.py b/otcextensions/osclient/rds/v3/instance.py
index 7ee759d0c..d6ab93ff3 100644
--- a/otcextensions/osclient/rds/v3/instance.py
+++ b/otcextensions/osclient/rds/v3/instance.py
@@ -352,6 +352,9 @@ def get_parser(self, prog_name):
 
     def take_action(self, parsed_args):
         # Attention: not conform password result in BadRequest with no info
+
+        # initialize sdk_connection with rds methods
+        _ = self.app.client_manager.rds
         client = self.app.client_manager.sdk_connection
         attrs = {}
         for attr in [
@@ -407,6 +410,8 @@ def get_parser(self, prog_name):
         return parser
 
     def take_action(self, parsed_args):
+        # initialize sdk_connection with rds methods
+        _ = self.app.client_manager.rds
         client = self.app.client_manager.sdk_connection
         attrs = {}
         for attr in [