From c5b5d3abd28e546e46cee013f6f3032a1c985a9a Mon Sep 17 00:00:00 2001
From: Michael Hayes <moikl.hayes@gmail.com>
Date: Thu, 26 Dec 2024 14:39:27 +1300
Subject: [PATCH] Show MNA equations for resistive circuits in the time-domain

---
 lcapy/netlist.py | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/lcapy/netlist.py b/lcapy/netlist.py
index 02d33231..4b9d53c7 100644
--- a/lcapy/netlist.py
+++ b/lcapy/netlist.py
@@ -772,12 +772,17 @@ def modified_nodal_analysis(self):
         """Perform modified nodal analysis for this netlist.  This is
         cached."""
 
-        if self.kind in ('time', 'super'):
-            raise ValueError(
-                'Cannot put time domain equations into matrix form.  '
-                'Convert to dc, ac, or laplace domain first.')
+        kind = self.kind
+        if kind in ('time', 'super'):
 
-        return SubNetlist(self, self.kind).mna
+            if self.reactances != []:
+                raise ValueError(
+                    'Cannot put time domain equations into matrix form due to'
+                    ' reactive components: %s.  Convert to dc, ac, or'
+                    ' laplace domain first.' % ', '.join(self.reactances))
+            kind = 'time'
+
+        return SubNetlist(self, kind).mna
 
     @lru_cache(1)
     def nodal_analysis(self, node_prefix=''):