diff --git a/laborious/activities/opc.py b/laborious/activities/opc.py
index c99a54d..23b2ac5 100644
--- a/laborious/activities/opc.py
+++ b/laborious/activities/opc.py
@@ -125,7 +125,15 @@ class OPC(BaseActivity):
 
         for server_id, config in opc_output_config.items():
             if self.opc_repository.get(server_id) is None:
-                self.error(f"OPC server {server_id} not found", metadata)
+                message = f"OPC server {server_id} not found to perform write operation."
+                self.send_notification(
+                    metadata=metadata,
+                    notification_id="OPC_SERVER_NOT_FOUND",
+                    message=message,
+                    block="write_opc_data",
+                    level=NotificationLevel.ERROR,
+                    attachment_content=f"OPC servers: {list(self.opc_repository.keys())}"
+                )
                 continue
 
             if 'prediction_tags' in config: