From fbfce99790d564ed7dac05fa357e60d59dde13eb Mon Sep 17 00:00:00 2001
From: Andreas Suter <andreas.suter@psi.ch>
Date: Wed, 1 Oct 2025 12:36:01 +0200
Subject: [PATCH] better handling of values=n/a when dumping the header info.

---
 src/external/MusrRoot/TMusrRunHeader.cpp | 7 ++++++-
 src/external/MusrRoot/TMusrRunHeader.h   | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/external/MusrRoot/TMusrRunHeader.cpp b/src/external/MusrRoot/TMusrRunHeader.cpp
index c7c653033..5d782e95b 100644
--- a/src/external/MusrRoot/TMusrRunHeader.cpp
+++ b/src/external/MusrRoot/TMusrRunHeader.cpp
@@ -1290,7 +1290,6 @@ void TMusrRunHeader::DumpHeader()
           digit_d = GetLeastSignificantDigit(prop.GetDemand());
           if (prop.GetDescription() != "n/a") {
             fmt.Form("%%s: %%.%dlf +- %%.%dlf %%s; SP: %%.%dlf; %%s", digit, digit, digit_d);
-
             tstr.Form(fmt, prop.GetLabel().Data(), prop.GetValue(), prop.GetError(), prop.GetUnit().Data(), prop.GetDemand(), prop.GetDescription().Data());
           } else {
             fmt.Form("%%s: %%.%dlf +- %%.%dlf %%s; SP: %%.%dlf", digit, digit, digit_d);
@@ -1327,6 +1326,12 @@ void TMusrRunHeader::DumpHeader()
             fmt.Form("%%s: %%.%dlf %%s; SP: %%.%dlf", digit, digit_d);
             tstr.Form(fmt, prop.GetLabel().Data(), prop.GetValue(), prop.GetUnit().Data(), prop.GetDemand());
           }
+        } else if (prop.GetDemand() == MRH_UNDEFINED) { // <value> = n/a
+          fmt.Form("%%s: %%s %%s");
+          if ((prop.GetUnit() != "n/a"))
+            tstr.Form(fmt, prop.GetLabel().Data(), "n/a", prop.GetUnit().Data());
+          else
+            tstr.Form(fmt, prop.GetLabel().Data(), "n/a", "n/a");
         }
         str.Form("  %03d - %s -@%d", i, tstr.Data(), MRH_TMUSR_RUN_PHYSICAL_QUANTITY);
         std::cout << std::endl << str;
diff --git a/src/external/MusrRoot/TMusrRunHeader.h b/src/external/MusrRoot/TMusrRunHeader.h
index 063abf1fa..9c088a1cd 100644
--- a/src/external/MusrRoot/TMusrRunHeader.h
+++ b/src/external/MusrRoot/TMusrRunHeader.h
@@ -40,7 +40,7 @@
 #include <TFolder.h>
 #include <TDirectory.h>
 
-#define MRH_UNDEFINED -9.99e99
+#define MRH_UNDEFINED -9.9e99
 
 #define MRH_DOUBLE_PREC 6