From acb7a6dffe6bfda1594654d0277ece210cddf520 Mon Sep 17 00:00:00 2001
From: rlar <rlar>
Date: Wed, 31 Jan 2018 19:17:18 +0100
Subject: [PATCH] a new variant of a fix, don't accept solution if previous one
 was marked CKTnoncon

this is only a "sketch" for the test-poly-3.cir debugging session.
there are more CKTnoncon in niiter, and all need to be studied/ponderd
  with respect to this "fix"
---
 src/maths/ni/niiter.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/maths/ni/niiter.c b/src/maths/ni/niiter.c
index 1a45b823b..882476cf7 100644
--- a/src/maths/ni/niiter.c
+++ b/src/maths/ni/niiter.c
@@ -26,6 +26,7 @@ int
 NIiter(CKTcircuit *ckt, int maxIter)
 {
     double startTime, *OldCKTstate0 = NULL;
+    int old_noncon;
     int error, i, j;
 
     int iterno = 0;
@@ -66,6 +67,7 @@ NIiter(CKTcircuit *ckt, int maxIter)
 
     for (;;) {
 
+        old_noncon = ckt->CKTnoncon;
         ckt->CKTnoncon = 0;
 
 #ifdef NEWPRED
@@ -240,7 +242,7 @@ NIiter(CKTcircuit *ckt, int maxIter)
                     ckt->CKTnoncon = ipass;
                 ipass = 0;
             }
-            if (ckt->CKTnoncon == 0) {
+            if (ckt->CKTnoncon == 0 && old_noncon == 0) {
                 ckt->CKTstat->STATnumIter += iterno;
                 FREE(OldCKTstate0);
                 printf("niiter[%d], accepted and return\n", iterno);