From f9c77cd5e18b065afecb5f570ab629d774819e66 Mon Sep 17 00:00:00 2001
From: Johannes Rest <johannes@jr-it-services.de>
Date: Mon, 23 Apr 2018 11:20:40 +0200
Subject: [PATCH] Committed by jr

---
 OneDriveArchiver/IoHelper.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/OneDriveArchiver/IoHelper.cs b/OneDriveArchiver/IoHelper.cs
index 23eb2dd..11f2bc4 100644
--- a/OneDriveArchiver/IoHelper.cs
+++ b/OneDriveArchiver/IoHelper.cs
@@ -40,7 +40,7 @@ namespace OneDriveArchiver
                 
                 // check if we have to create either year or month folder...
                 // start with parent year folder...
-                var fullYearFolderPath = Path.Combine(basePath, fileYear);
+                var fullYearFolderPath = Path.Combine(basePath ?? throw new InvalidOperationException(), fileYear);
                 var fullMonthFolderPath = Path.Combine(Path.Combine(basePath, fileYear), fileMonth);
                 if (!Directory.Exists(fullYearFolderPath))
                 {