diff --git a/SpritePacker-CLI/Program.cs b/SpritePacker-CLI/Program.cs
index 9e2837d..6442157 100644
--- a/SpritePacker-CLI/Program.cs
+++ b/SpritePacker-CLI/Program.cs
@@ -58,7 +58,11 @@ namespace SpritePacker
 						Verbose = true;
 						break;
 					case "--preset":
-						rawSourceLocations = File.ReadAllText(args[++i]);
+						string presetFilename = args[++i];
+						if (File.Exists(presetFilename))
+							rawSourceLocations = File.ReadAllText(presetFilename);
+						else
+							Console.Error.WriteLine("Warning: Couldn't find the preset csv file at {0}", presetFilename);
 						break;
 					case "--csv":
 						outputFormat = OutputFormat.CSV;