diff --git a/js/app/controllers/DownloadModule.js b/js/app/controllers/DownloadModule.js
index 2bd8354..c7e2c0d 100644
--- a/js/app/controllers/DownloadModule.js
+++ b/js/app/controllers/DownloadModule.js
@@ -39,6 +39,10 @@ Ext.define('amdaDesktop.DownloadModule', {
             var form = uiContent.down('form').getForm();
             var values = form.getValues();                
             //   Ext.state.Manager.set(this.id + '_form', values);
+            if (Number.isNaN(Date.parse(values.startDate)) || Number.isNaN(Date.parse(values.stopDate))) {
+                return;
+            }
+            
             Ext.state.Manager.set('timeinterval', {'startDate' : values.startDate,'stopDate' : values.stopDate });
     },
        
--
libgit2 0.21.2