diff --git a/MergeDAT/MergeDAT.cs b/MergeDAT/MergeDAT.cs
index 8e24dc99..acf013a9 100644
--- a/MergeDAT/MergeDAT.cs
+++ b/MergeDAT/MergeDAT.cs
@@ -86,7 +86,7 @@ namespace SabreTools
 			logger.Start();
 
 			// Output the title
-			Build.Start("DiffDat");
+			Build.Start("MergeDAT");
 
 			List<String> inputs = new List<String>();
 			bool help = false, dedup = false, diff = false, forceunpack = false, old = false, log = false, noDate = false;
diff --git a/SabreHelper/Build.cs b/SabreHelper/Build.cs
index adc500b5..c852a4c5 100644
--- a/SabreHelper/Build.cs
+++ b/SabreHelper/Build.cs
@@ -162,7 +162,7 @@ Options:
 				case "MergeDAT":
 					Console.WriteLine(@"MergeDAT - Merge two or more DATs
 -----------------------------------------
-Usage: MergeDAT [options] [filename] ...
+Usage: MergeDAT [options] [filename|dirname] <filename|dirname> ...
 
 Options:
   -h, -?, --help	Show this help dialog
diff --git a/SabreHelper/RomManipulation.cs b/SabreHelper/RomManipulation.cs
index c4fb5e47..477e1227 100644
--- a/SabreHelper/RomManipulation.cs
+++ b/SabreHelper/RomManipulation.cs
@@ -203,7 +203,7 @@ namespace SabreTools.Helper
 								}
 								else if (child.Attributes["size"] != null)
 								{
-									size = Int64.Parse(child.Attributes["size"].Value);
+									Int64.TryParse(child.Attributes["size"].Value, out size);
 								}
 
 								roms.Add(new RomData
@@ -240,7 +240,7 @@ namespace SabreTools.Helper
 												}
 												else if (data.Attributes["size"] != null)
 												{
-													size = Int64.Parse(data.Attributes["size"].Value);
+													Int64.TryParse(data.Attributes["size"].Value, out size);
 												}
 
 												roms.Add(new RomData