From c27e4e1a33806a18acd9859a244d5b8b7512982c Mon Sep 17 00:00:00 2001
From: Andreas Suter <andreas.suter@psi.ch>
Date: Thu, 27 Nov 2025 15:32:16 +0100
Subject: [PATCH] adopt PFitter to ROOT v6-38-00 and make sure it is backwards
 compatible.

---
 src/classes/PFitter.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/classes/PFitter.cpp b/src/classes/PFitter.cpp
index 023d15cae..59faad577 100644
--- a/src/classes/PFitter.cpp
+++ b/src/classes/PFitter.cpp
@@ -2683,7 +2683,7 @@ Bool_t PFitter::ExecuteSave(Bool_t firstSave)
   // write correlation matrix
   fout << std::endl << " CORRELATION COEFFICIENTS";
   fout << std::endl << "-------------------------------------------------------------------------";
-  if (mnState.HasGlobalCC() && mnState.HasCovariance()) {
+  if (mnState.IsValid() && mnState.HasCovariance()) {
     ROOT::Minuit2::MnGlobalCorrelationCoeff corr = mnState.GlobalCC();
     ROOT::Minuit2::MnUserCovariance cov = mnState.Covariance();
     PIntVector parNo;