From ac07aee38dddd3ab9853d513cbbbbce78628bbb9 Mon Sep 17 00:00:00 2001
From: John Lewin <lewin76@gmail.com>
Date: Tue, 30 Jan 2018 18:01:16 -0800
Subject: [PATCH] Prevent exceptions on removed/missing directories

---
 Library/Providers/FileSystem/FileSystemContainer.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Library/Providers/FileSystem/FileSystemContainer.cs b/Library/Providers/FileSystem/FileSystemContainer.cs
index dec694289..c4e846e08 100644
--- a/Library/Providers/FileSystem/FileSystemContainer.cs
+++ b/Library/Providers/FileSystem/FileSystemContainer.cs
@@ -60,7 +60,8 @@ namespace MatterHackers.MatterControl.Library
 			this.ChildContainers = new List<ILibraryContainerLink>();
 			this.Items = new List<ILibraryItem>();
 #if !__ANDROID__
-			if (AggContext.OperatingSystem == OSType.Windows)
+			if (AggContext.OperatingSystem == OSType.Windows
+				&& Directory.Exists(path))
 			{
 				directoryWatcher = new FileSystemWatcher(path);
 				directoryWatcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;