diff --git a/laborious/activities/opc.py b/laborious/activities/opc.py
index 3f40b08..d54686c 100644
--- a/laborious/activities/opc.py
+++ b/laborious/activities/opc.py
@@ -98,6 +98,8 @@ class OPC(BaseActivity):
 
         success = True
 
+        self.logger.debug(f"OPC output config: {opc_output_config}")
+        self.logger.debug(f"OPC servers: {self.opc_repository}")
         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)