From 32a34176fb199ba8cc6d4df122cccb5c1c07bcd3 Mon Sep 17 00:00:00 2001
From: Jonathan Burkhardt <ucchejbb@users.noreply.github.com>
Date: Wed, 20 Mar 2024 10:33:15 -0400
Subject: [PATCH] Update msxqual.c

Attempt to prevent infinite loop on wall species redistribution (provided via email by Feng Shang).
---
 src/solver/msxqual.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/solver/msxqual.c b/src/solver/msxqual.c
index aea02e3..410ed5d 100644
--- a/src/solver/msxqual.c
+++ b/src/solver/msxqual.c
@@ -1457,7 +1457,8 @@ void  evalnodeinflow(int k, double tstep, double* volin, double* massin)
             MSX.FirstSeg[k] = seg->prev;
             MSX.Link[k].nsegs--;
             if (MSX.FirstSeg[k] == NULL) MSX.LastSeg[k] = NULL;
-
+            else MSX.FirstSeg[k]->next = NULL; //03/19/2024 added to break the linked segments 
+		    
             // ... recycle the used up segment
             seg->prev = MSX.FreeSeg;
             MSX.FreeSeg = seg;