From 5fc768ca866b12e269541393e3bbe99322d26a1a Mon Sep 17 00:00:00 2001
From: tbaudier <thomas.baudier@creatis.insa-lyon.fr>
Date: Mon, 15 Jan 2018 11:36:32 +0100
Subject: [PATCH] Exception when tag is not found

---
 tools/clitkImageConvertGenericFilter.cxx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/clitkImageConvertGenericFilter.cxx b/tools/clitkImageConvertGenericFilter.cxx
index 1e95a7b..51a43a0 100644
--- a/tools/clitkImageConvertGenericFilter.cxx
+++ b/tools/clitkImageConvertGenericFilter.cxx
@@ -148,6 +148,10 @@ void clitk::ImageConvertGenericFilter::UpdateWithInputImageType()
       // Read the attribute  Image Position (Patient)
       gdcm::Tag  DetectorInformationSequenceTag(0x0054,0x0022);
       const gdcm::DataElement & DIS = ds.GetDataElement(DetectorInformationSequenceTag);
+      if (!DIS.GetByteValue()) {
+        std::cout << "Error: could not find 0x0054,0x0022 tag. Abort." << std::endl;
+        exit(0);
+      }
       gdcm::SmartPointer<gdcm::SequenceOfItems> sqf = DIS.GetValueAsSQ();
       gdcm::Item & item = sqf->GetItem(1);
       gdcm::DataSet & ds_position = item.GetNestedDataSet();
-- 
2.47.1