diff --git a/Core/DAL/DataService.cs b/Core/DAL/DataService.cs
index ba4f43e..9f53dd5 100644
--- a/Core/DAL/DataService.cs
+++ b/Core/DAL/DataService.cs
@@ -73,7 +73,7 @@ namespace LeafWeb.Core.DAL
 		{
 			return _db.LeafInputFiles.Find(id);
 		}
-
+		
 		public IQueryable<LeafInputFile> GetLeafInputFiles(LeafInputStatusType status)
 		{
 			return
diff --git a/Core/Entities/LeafOutputFile.cs b/Core/Entities/LeafOutputFile.cs
index afe412d..0793f8c 100644
--- a/Core/Entities/LeafOutputFile.cs
+++ b/Core/Entities/LeafOutputFile.cs
@@ -10,5 +10,8 @@ namespace LeafWeb.Core.Entities
 		public string Filename { get; set; }
 
 		public byte[] Contents { get; set; }
+
+		// convention for the filename which LeafCharter uses
+		public bool IsLeafChartFile => Filename?.StartsWith("cntrlcomparison") ?? false;
 	}
 }
diff --git a/Web/Controllers/LeafCharterController.cs b/Web/Controllers/LeafCharterController.cs
index 959e685..ed087cb 100644
--- a/Web/Controllers/LeafCharterController.cs
+++ b/Web/Controllers/LeafCharterController.cs
@@ -16,30 +16,47 @@ namespace LeafWeb.Web.Controllers
 	{
 		public ActionResult Index(int leafInputFileId)
 		{
+			var hasLeafOutputFile =
+				DataService
+				.GetLeafInputFile(leafInputFileId)?
+				.LeafOutputFiles?
+				.FirstOrDefault(f => f.IsLeafChartFile) != null;
+
 			return View(leafInputFileId);
 		}
 
 	    public ActionResult LeafCharts(int leafInputFileId, int number)
 	    {
-		    var leafInputFile = DataService.GetLeafInputFile(leafInputFileId);
-		    var leafOutputFile = leafInputFile.LeafOutputFiles.FirstOrDefault(f => f.Filename.StartsWith("cntrlcomparison"));
-		    //if (leafOutputFile == null)
-			//    return View(); // TODO: break
+		    var leafOutputFile = 
+				DataService
+				.GetLeafInputFile(leafInputFileId)?
+				.LeafOutputFiles?
+				.FirstOrDefault(f => f.IsLeafChartFile);
 
-		    CntrlComparison[] cntrlComparison;
-			using (var parser = new CntrlComparisonParser(leafOutputFile.Contents))
+		    if (leafOutputFile == null)
+			    return View(); // TODO: break
+
+			return File(GetChartImage(leafOutputFile.Contents, number), "image/png", "mychart.png");
+		}
+
+		private byte[] GetChartImage(byte[] fileContents, int number, ChartImageFormat format = ChartImageFormat.Png)
+		{
+			CntrlComparison[] cntrlComparison;
+			using (var parser = new CntrlComparisonParser(fileContents))
 				cntrlComparison = parser.Parse();
 
-		    var curveData = CurveDataConverter.Convert(cntrlComparison).ToArray();
+			var curveData = CurveDataConverter.Convert(cntrlComparison).ToArray();
 
-		    var charts = LeafWebCharter.ProduceCharts(curveData[2]);
+			var charts = LeafWebCharter.ProduceCharts(curveData[2]);
 
-		    using (var ms = new MemoryStream())
+			//Image.FromFile()
+
+			using (var ms = new MemoryStream())
 			{
-				charts.Skip(number).First().SaveImage(ms, ChartImageFormat.Png);
+				charts.Skip(number).First().SaveImage(ms, format);
 				ms.Seek(0, SeekOrigin.Begin);
 
-				return File(ms.ToArray(), "image/png", "mychart.png");
+				return ms.ToArray();
 			}
 		}
 
diff --git a/Web/ViewModels/LeafOutput/LeafOutputViewModel.cs b/Web/ViewModels/LeafOutput/LeafOutputViewModel.cs
index b4d19bc..92eae6a 100644
--- a/Web/ViewModels/LeafOutput/LeafOutputViewModel.cs
+++ b/Web/ViewModels/LeafOutput/LeafOutputViewModel.cs
@@ -13,6 +13,7 @@ namespace LeafWeb.Web.ViewModels.LeafOutput
 		public string CurrentStatus { get; set; }
 		public string[] ErrorMessages { get; set; }
 		public string[] LeafOutputFilenames { get; set; }
+		public bool HasLeafChartOutputFile { get; set; }
 		public string LeafInputName { get; set; }
 		public string LeafInputIdentifier { get; set; }
 		public string LeafInputSiteId { get; set; }
@@ -33,6 +34,9 @@ namespace LeafWeb.Web.ViewModels.LeafOutput
 								.Select(o => o.Filename)
 								.ToArray() 
 								?? new string[] {}))
+					.ForMember(dest => dest.HasLeafChartOutputFile,
+						opt => opt.ResolveUsing(
+							file => file.LeafOutputFiles?.Any(o => o.IsLeafChartFile)))
 					.ForMember(dest => dest.LeafInputName, opt => opt.MapFrom(src => src.LeafInput.Name))
 					.ForMember(dest => dest.LeafInputIdentifier, opt => opt.MapFrom(src => src.LeafInput.Identifier))
 					.ForMember(dest => dest.LeafInputSiteId, opt => opt.MapFrom(src => src.LeafInput.SiteId))