From 0cfa6627af1dc20bb641f8021d54837ae3cdf2d2 Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Tue, 28 Jul 2026 23:12:52 +0200
Subject: [PATCH] Issue warning message only once

---
 src/maths/KLU/klusmp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/maths/KLU/klusmp.c b/src/maths/KLU/klusmp.c
index 4b68eb1f9..8e20d1d26 100644
--- a/src/maths/KLU/klusmp.c
+++ b/src/maths/KLU/klusmp.c
@@ -1828,6 +1828,8 @@ SMPfindElt (SMPmatrix *eMatrix, int Row, int Col, int CreateIfMissing)
 {
     MatrixPtr Matrix = eMatrix->SPmatrix ;
 
+    static bool nomsg = TRUE;
+
     if (eMatrix->CKTkluMODE)
     {
         int i ;
@@ -1859,7 +1861,10 @@ SMPfindElt (SMPmatrix *eMatrix, int Row, int Col, int CreateIfMissing)
         Row = Matrix->ExtToIntRowMap [Row] ;
         Col = Matrix->ExtToIntColMap [Col] ;
         if (Row < 0 || Col < 0) {
-            fprintf(stderr, "Warning: element not found, as internal Row/Col map is not avaialable!\n");
+            if (nomsg) {
+                fprintf(stderr, "Warning: element not found, as internal Row/Col map is not avaialable!\n");
+                nomsg = FALSE;
+            }
             return NULL;
         }
         Element = Matrix->FirstInCol [Col] ;