1 files changed, 5 insertions, 0 deletions
diff --git a/src/examples/rrdJFlot.html b/src/examples/rrdJFlot.html
index 9c24f59..b5fb4a5 100644
--- a/src/examples/rrdJFlot.html
+++ b/src/examples/rrdJFlot.html
@@ -87,10 +87,15 @@
       // and performs the update of the Web page
       function update_fname_handler(bf) {
           var i_rrd_data=undefined;
+          if (bf.getLength()<1) {
+            alert("File "+fname+" is empty (possibly loading failed)!");
+            return 1;
+          }
           try {
             var i_rrd_data=new RRDFile(bf);            
           } catch(err) {
             alert("File "+fname+" is not a valid RRD archive!\n"+err);
+            return 1;
           }
           if (i_rrd_data!=undefined) {
             rrd_data=i_rrd_data;