From d47a40d85eaf9e54e9c6ff32cf4b8837b1aaa85e Mon Sep 17 00:00:00 2001
From: NichtJens <nichtjens@gmail.com>
Date: Tue, 3 Feb 2026 15:13:44 +0100
Subject: [PATCH] raise exception if all pixels are bad

---
 sf_daq_broker/writer/detector_writer.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sf_daq_broker/writer/detector_writer.py b/sf_daq_broker/writer/detector_writer.py
index c3d7d52..ff1af45 100644
--- a/sf_daq_broker/writer/detector_writer.py
+++ b/sf_daq_broker/writer/detector_writer.py
@@ -357,6 +357,11 @@ def create_pedestal_file(
         nbad = ntotal - ngood
         _logger.info(f"{detector_name}: number of good pixels: {ngood} from {ntotal} in total ({nbad} bad pixels)")
 
+        if ngood == 0:
+            msg = f"pedestal file: output file {full_fileNameOut} contains no good pixel"
+            _logger.error(msg)
+            raise RuntimeError(msg)
+
 
 
 def copy_pedestal_file(request_time, file_pedestal, detector, detector_config_file):