diff --git a/js/app/views/PlotTabResultUI.js b/js/app/views/PlotTabResultUI.js
index 0927dcd..b226f57 100644
--- a/js/app/views/PlotTabResultUI.js
+++ b/js/app/views/PlotTabResultUI.js
@@ -376,6 +376,7 @@ Ext.define('amdaUI.PlotTabResultUI', {
     
 	updatePlotImage: function(configResult, newPlot) {
 		this.crtContext = configResult.context;
+                                        
 		
 		this.crtTTFileIndex = configResult.ttFileIndex;
 		
@@ -509,15 +510,8 @@ Ext.define('amdaUI.PlotTabResultUI', {
 					var ttFileIndex = this.crtTTFileIndex;
 					var ttintervalIndex = this.crtContext.page.ttIndex;
 					
-					if (ttintervalIndex <= 0){
-						if (ttFileIndex <= 0){
-							myDesktopApp.errorMsg('You are on the first interval of your request');
-							return;
-						}
-						else {
-							--ttFileIndex;
-							ttintervalIndex = 0;
-						}
+					if (ttintervalIndex <= 0 && ttFileIndex>0){  
+                                                                                                                     --ttFileIndex;                                                                                                      
 					}
 					else
 						--ttintervalIndex;
@@ -533,6 +527,7 @@ Ext.define('amdaUI.PlotTabResultUI', {
 					var ttintervalIndex = this.crtContext.page.ttIndex;
 					
 					if (ttintervalIndex >= this.crtContext.page.ttNbIntervals-1){
+                                                                                                          
 						++ttFileIndex;
 						ttintervalIndex = 0;
 					}
--
libgit2 0.21.2