From 9c0b6d196db90a13c796cace23e915ad67c3a8a5 Mon Sep 17 00:00:00 2001
From: William McLaren <william.mclaren@genomicsengland.co.uk>
Date: Tue, 28 Jun 2022 14:39:46 +0100
Subject: [PATCH] check Genomic_position header is present at startup

---
 MTR.pm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/MTR.pm b/MTR.pm
index a0f86e78..3f6e8a2f 100644
--- a/MTR.pm
+++ b/MTR.pm
@@ -79,6 +79,10 @@ sub new {
   }
   close HEAD;
 
+  if(!exists($self->{headers}->{'Genomic_position'})) {
+    die "Required header Genomic_position not found.\n";
+  }
+
   return $self;
 }