diff --git a/ChangeLog b/ChangeLog
index bac6387b..66cd03d2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2015-06-07  Paul Schneider  <paul@pschneider.fr>
+
+	* Makefile: cleans the StyleCop cache
+
 2015-06-06  Paul Schneider  <paul@pschneider.fr>
 
 	* Yavsc.sln: modifies the Version control integration
diff --git a/Makefile b/Makefile
index 1c6a33e1..c1305b83 100644
--- a/Makefile
+++ b/Makefile
@@ -45,6 +45,7 @@ build:
 
 clean:
 	xbuild /t:Clean
+	find -name "StyleCop.Cache" -exec rm {} \;
 	rm -rf $(LDYDESTDIR)
 
 sourcepkg:
diff --git a/web/ApiControllers/CalendarController.cs b/web/ApiControllers/CalendarController.cs
index f30e168c..0c7152ee 100644
--- a/web/ApiControllers/CalendarController.cs
+++ b/web/ApiControllers/CalendarController.cs
@@ -108,7 +108,6 @@ namespace Yavsc.ApiControllers
 				LogoImgLocator = "http://yavsc.pschneider.fr/favicon.png",
 				Location = new Position () { Longitude = 0, Latitude = 0 },
 				LocationType = "Salle des fêtes"
-
 			};
 		}
 
@@ -133,12 +132,6 @@ namespace Yavsc.ApiControllers
 
 		}
 
-
-
-
-
-
-
 		/// <summary>
 		/// Registers with push notifications enabled.
 		/// </summary>
@@ -200,7 +193,6 @@ namespace Yavsc.ApiControllers
 			using (r) { 
 				var msg = new MessageWithPayload<YaEvent> () { data = new YaEvent[] { (YaEvent)evpub } };
 				msg.to = string.Join (" ", Circle.Union (evpub.Circles));
-
 				return r.Invoke (msg);
 			}
 		}
diff --git a/web/ApiControllers/FrontOfficeApiController.cs b/web/ApiControllers/FrontOfficeApiController.cs
index faf80669..47fc8615 100644
--- a/web/ApiControllers/FrontOfficeApiController.cs
+++ b/web/ApiControllers/FrontOfficeApiController.cs
@@ -1,29 +1,18 @@
 using System;
-using Yavsc;
-using SalesCatalog;
-using System.Web.Routing;
-using System.Threading.Tasks;
-using System.Diagnostics;
-using System.Web.Http;
-using System.Net.Http;
-using System.Web;
-using System.Linq;
-using System.IO;
+using System.Collections.Generic;
 using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Web.Http;
+using System.Web.Profile;
 using System.Web.Security;
-using Yavsc.Model.WorkFlow;
-using System.Reflection;
-using System.Collections.Generic;
-using Yavsc.Model.RolesAndMembers;
-using Yavsc.Controllers;
 using Yavsc.Formatters;
-using System.Text;
-using System.Web.Profile;
-using System.Collections.Specialized;
+using Yavsc.Helpers;
 using Yavsc.Model;
 using Yavsc.Model.FrontOffice;
-using Yavsc.Helpers;
-using System.Net.Http.Headers;
+using Yavsc.Model.RolesAndMembers;
+using Yavsc.Model.WorkFlow;
+using System.IO;
 
 namespace Yavsc.ApiControllers
 {
@@ -161,15 +150,16 @@ namespace Yavsc.ApiControllers
 							LocalizedText.Estimate_not_found))
 				};
 
-			HttpResponseMessage result = new HttpResponseMessage () {
-				Content = new ObjectContent (typeof(string),
-					texest,
-					new TexToPdfFormatter ()) 
-			};
-
-			result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue ("attachment") {
-				FileName = "estimate-" + id.ToString () + ".pdf" 
-			};
+			var memPdf = new MemoryStream ();
+			HttpResponseMessage result = new HttpResponseMessage ();
+			new TexToPdfFormatter ().WriteToStream (
+				typeof(string), texest, memPdf,null);
+			memPdf.Position = 0;
+			var sr = new StreamReader(memPdf);
+			var str = sr.ReadToEnd();
+			result.Content = new StringContent (str);
+			TexToPdfFormatter.SetFileName (result.Content.Headers, "estimate-" + id.ToString ());
+			result.Content.Headers.ContentType = new MediaTypeHeaderValue("text/x-tex");
 			return result;
 		}
 
@@ -226,7 +216,6 @@ namespace Yavsc.ApiControllers
 					prtu.SetPropertyValue("Mobile",model.Mobile);
 					prtu.SetPropertyValue("Phone",model.Phone);
 					prtu.SetPropertyValue("ZipCode",model.ZipCode);
-
 					break;
 				default:
 					break;
diff --git a/web/ChangeLog b/web/ChangeLog
new file mode 100644
index 00000000..cd386431
--- /dev/null
+++ b/web/ChangeLog
@@ -0,0 +1,14 @@
+2015-06-07  Paul Schneider  <paul@pschneider.fr>
+
+	* CalendarController.cs: removes useless spaces
+
+	* FrontOfficeApiController.cs: Makes the tex to pdf exceptions
+	available to the user interface, as part of the application
+	process.
+	Cleans the using clauses. 
+
+	* TexToPdfFormatter.cs: sets the filename as response header.
+
+	* Web.csproj: a new FormatterException, thrown when exit code
+	of texi2pdf is not null
+
diff --git a/web/Formatters/TexToPdfFormatter.cs b/web/Formatters/TexToPdfFormatter.cs
index 5f92be6c..ed9d9724 100644
--- a/web/Formatters/TexToPdfFormatter.cs
+++ b/web/Formatters/TexToPdfFormatter.cs
@@ -26,6 +26,7 @@ using System.IO;
 using System.Web;
 using System.Diagnostics;
 using System.Net.Http;
+using Yavsc.Helpers;
 
 namespace Yavsc.Formatters
 {
@@ -99,7 +100,7 @@ namespace Yavsc.Formatters
 				p.Start ();
 				p.WaitForExit ();
 				if (p.ExitCode != 0)
-					throw new Exception ("Pdf generation failed with exit code:" + p.ExitCode);
+					throw new FormatterException ("Pdf generation failed with exit code:" + p.ExitCode);
 			}
 
 			using (StreamReader sr = new StreamReader (fo.FullName)) {
@@ -108,7 +109,14 @@ namespace Yavsc.Formatters
 			}
 			fi.Delete();
 			fo.Delete();
+			if (contentHeaders != null)
+				SetFileName(contentHeaders, value.GetHashCode ().ToString ());
+		}
+		
+		public static void SetFileName(HttpContentHeaders contentHeaders, string basename) {
+			contentHeaders.ContentDisposition = new ContentDispositionHeaderValue ("attachment") {
+				FileName = "doc-" + basename + ".pdf"
+			};
 		}
-
 	}
 }
diff --git a/web/Web.csproj b/web/Web.csproj
index 181e94cf..87a43d93 100644
--- a/web/Web.csproj
+++ b/web/Web.csproj
@@ -181,6 +181,7 @@
     <Compile Include="Helpers\TemplateException.cs" />
     <Compile Include="Helpers\MarkdownHelper.cs" />
     <Compile Include="ApiControllers\CalendarController.cs" />
+    <Compile Include="Formatters\FormatterException.cs" />
   </ItemGroup>
   <ItemGroup>
     <Content Include="Views\Web.config" />