=== modified file 'dhis-2/dhis-web/dhis-web-event-visualizer/src/main/webapp/dhis-web-event-visualizer/app/scripts/app.js'
--- dhis-2/dhis-web/dhis-web-event-visualizer/src/main/webapp/dhis-web-event-visualizer/app/scripts/app.js	2014-07-11 12:35:42 +0000
+++ dhis-2/dhis-web/dhis-web-event-visualizer/src/main/webapp/dhis-web-event-visualizer/app/scripts/app.js	2014-07-13 10:09:36 +0000
@@ -5783,8 +5783,6 @@
 							return;
 						}
 
-                        web.mask.show(ns.app.centerRegion, 'Error while creating table..');
-
                         ns.app.paramString = paramString;
 
                         web.report.createReport(layout, response, isUpdateGui);
@@ -5807,6 +5805,11 @@
                 xResponse = service.response.aggregate.getExtendedResponse(xLayout, response);
                 xLayout = getSXLayout(xLayout, xResponse);
 
+                if (!xLayout) {
+                    web.mask.hide(ns.app.centerRegion);
+                    return;
+                }
+
                 web.mask.show(ns.app.centerRegion, 'Error while rendering chart..');
                 
                 chart = web.report.aggregate.createChart(layout, xLayout, xResponse, ns.app.centerRegion);

=== modified file 'dhis-2/dhis-web/dhis-web-event-visualizer/src/main/webapp/dhis-web-event-visualizer/app/scripts/core.js'
--- dhis-2/dhis-web/dhis-web-event-visualizer/src/main/webapp/dhis-web-event-visualizer/app/scripts/core.js	2014-07-13 08:38:49 +0000
+++ dhis-2/dhis-web/dhis-web-event-visualizer/src/main/webapp/dhis-web-event-visualizer/app/scripts/core.js	2014-07-13 10:09:36 +0000
@@ -1196,7 +1196,8 @@
 			service.layout.getSyncronizedXLayout = function(xLayout, xResponse) {
 				var removeDimensionFromXLayout,
 					getHeaderNames,
-					dimensions = Ext.Array.clean([].concat(xLayout.columns || [], xLayout.rows || [], xLayout.filters || []));
+					dimensions = Ext.Array.clean([].concat(xLayout.columns || [], xLayout.rows || [], xLayout.filters || [])),
+                    getSeriesValidatedLayout;
 
 				removeDimensionFromXLayout = function(objectName) {
 					var getUpdatedAxis;
@@ -1239,6 +1240,19 @@
 					return headerNames;
 				};
 
+                getSeriesValidatedLayout = function(xLayout) {
+                    var nSeries = xLayout.columns[0].ids.length * xLayout.rows[0].ids.length,
+                        message = 'This chart is potentially very large due to the high number of series and category items. Create the chart anyway?';
+
+                    if (nSeries > 200) {
+                        if (!confirm(message))  {
+                            return null;
+                        }
+                    }
+
+                    return xLayout;
+                };
+
 				return function() {
 
 					// items
@@ -1262,11 +1276,20 @@
 					// Re-layout
 					layout = api.layout.Layout(xLayout);
 
-					if (layout) {
-						return service.layout.getExtendedLayout(layout);
-					}
-
-					return null;
+                    if (!layout) {
+                        return null;
+                    }
+
+                    xLayout = service.layout.getExtendedLayout(layout);
+
+                    // validate number of series
+                    xLayout = getSeriesValidatedLayout(xLayout);
+
+                    if (!xLayout) {
+                        return null;
+                    }
+
+                    return xLayout;
 				}();
 			};
 

=== modified file 'dhis-2/dhis-web/dhis-web-mapping/src/main/webapp/dhis-web-mapping/app/scripts/core.js'
--- dhis-2/dhis-web/dhis-web-mapping/src/main/webapp/dhis-web-mapping/app/scripts/core.js	2014-07-03 12:55:11 +0000
+++ dhis-2/dhis-web/dhis-web-mapping/src/main/webapp/dhis-web-mapping/app/scripts/core.js	2014-07-13 10:09:36 +0000
@@ -60,7 +60,7 @@
 				})
 			],
 			displayProjection: new OpenLayers.Projection('EPSG:4326'),
-			maxExtent: new OpenLayers.Bounds(-20037508, -20037508, 20037508, 20037508),
+			//maxExtent: new OpenLayers.Bounds(-1160037508, -1160037508, 1160037508, 1160037508),
 			mouseMove: {}, // Track all mouse moves
 			relocate: {} // Relocate organisation units
 		});