From 8e175f1e779b7e0581300022db9cfd6a1dd04ccf Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Sun, 20 Nov 2022 12:10:40 +0100
Subject: [PATCH] Replace obscure warning "singular matrix: check nodes mymode1
 and mynode1" by "singular matrix: check node mynode1", if both node names are
 equal.

---
 src/maths/ni/niiter.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/maths/ni/niiter.c b/src/maths/ni/niiter.c
index 94e64e25f..597391750 100644
--- a/src/maths/ni/niiter.c
+++ b/src/maths/ni/niiter.c
@@ -123,7 +123,10 @@ NIiter(CKTcircuit *ckt, int maxIter)
                      */
                     if (ft_ngdebug || msgcount < 6) {
                         SMPgetError(ckt->CKTmatrix, &i, &j);
-                        SPfrontEnd->IFerrorf(ERR_WARNING, "singular matrix:  check nodes %s and %s\n", NODENAME(ckt, i), NODENAME(ckt, j));
+                        if(eq(NODENAME(ckt, i), NODENAME(ckt, j)))
+                            SPfrontEnd->IFerrorf(ERR_WARNING, "singular matrix:  check node %s\n", NODENAME(ckt, i));
+                        else
+                            SPfrontEnd->IFerrorf(ERR_WARNING, "singular matrix:  check nodes %s and %s\n", NODENAME(ckt, i), NODENAME(ckt, j));
                         msgcount += 1;
                     }
                     ckt->CKTstat->STATnumIter += iterno;