From b3ffbd62587828bd12b67657ece93a3de4885dc8 Mon Sep 17 00:00:00 2001
From: Jeff Young <jeff@rokeby.ie>
Date: Wed, 1 Feb 2023 00:37:44 +0000
Subject: [PATCH] Don't include unconnected nets in signals list.

Fixes https://gitlab.com/kicad/code/kicad/issues/4961
---
 eeschema/sim/sim_plot_frame.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/eeschema/sim/sim_plot_frame.cpp b/eeschema/sim/sim_plot_frame.cpp
index 77d4092626..a8970853ca 100644
--- a/eeschema/sim/sim_plot_frame.cpp
+++ b/eeschema/sim/sim_plot_frame.cpp
@@ -562,7 +562,9 @@ void SIM_PLOT_FRAME::StartSimulation( const wxString& aSimCommand )
     if( simulatorLock.owns_lock() )
     {
         wxBusyCursor toggle;
+        wxString     unconnected = wxString( wxS( "unconnected-(" ) );
 
+        unconnected.Replace( '(', '_' );    // Convert to SPICE markup
         m_signals.clear();
 
         // Add voltages
@@ -571,7 +573,7 @@ void SIM_PLOT_FRAME::StartSimulation( const wxString& aSimCommand )
             // netnames are escaped (can contain "{slash}" for '/') Unscape them:
             wxString netname = UnescapeString( net );
 
-            if( netname != "GND" && netname != "0" )
+            if( netname != "GND" && netname != "0" && !netname.StartsWith( unconnected ) )
                 m_signals.push_back( wxString::Format( "V(%s)", netname ) );
         }