diff --git a/laborious/activities/opc.py b/laborious/activities/opc.py
index 4834288..e39a35d 100644
--- a/laborious/activities/opc.py
+++ b/laborious/activities/opc.py
@@ -141,7 +141,7 @@ class OPC(BaseActivity):
 
             if 'prediction_tags' in config:
                 for tag, tag_config in config['prediction_tags'].items():
-                    success = success and self.write_data(
+                    local_success = self.write_data(
                         server_id=server_id,
                         tag=tag,
                         data=data.head(1)['prediction'].values[0],
@@ -149,10 +149,15 @@ class OPC(BaseActivity):
                         tag_type='prediction',
                         metadata=metadata
                     )
+                    if local_success:
+                        self.info(
+                            f"Prediction data written to OPC server {server_id} for tag {tag}.", metadata)
+                    else:
+                        success = success and local_success
 
             if 'confidence_tags' in config:
                 for tag, tag_config in config['confidence_tags'].items():
-                    self.write_data(
+                    local_success = self.write_data(
                         server_id=server_id,
                         tag=tag,
                         data=data.head(1)['prediction_confidence'].values[0],
@@ -160,6 +165,11 @@ class OPC(BaseActivity):
                         tag_type='confidence',
                         metadata=metadata
                     )
+                    if local_success:
+                        self.info(
+                            f"Confidence data written to OPC server {server_id} for tag {tag}.", metadata)
+                    else:
+                        success = success and local_success
 
         return self.process_confidence(data, success, metadata)