From 43d809f2b7f9da2158bccf84db8b58684feff9fc Mon Sep 17 00:00:00 2001
From: jlewin <lewin76@gmail.com>
Date: Wed, 20 Feb 2019 18:13:40 -0800
Subject: [PATCH] Guard for unknown state

---
 .../PrinterCommunication/Io/ToolChangeStream.cs             | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/MatterControlLib/PrinterCommunication/Io/ToolChangeStream.cs b/MatterControlLib/PrinterCommunication/Io/ToolChangeStream.cs
index db1a157b7..00e075b66 100644
--- a/MatterControlLib/PrinterCommunication/Io/ToolChangeStream.cs
+++ b/MatterControlLib/PrinterCommunication/Io/ToolChangeStream.cs
@@ -97,7 +97,11 @@ namespace MatterHackers.MatterControl.PrinterCommunication.Io
 						commandQueue.Enqueue(gcodeToQueue);
 					}
 
-					commandQueue.Enqueue($"G1 F{feedRate}");
+					if (feedRate != double.PositiveInfinity)
+					{
+						commandQueue.Enqueue($"G1 F{feedRate}");
+					}
+
 					commandQueue.Enqueue(lineIn);
 					queuedSwitch = true;
 				}