diff --git a/main.lua b/main.lua
index 4b3e63d..8aa72d6 100755
--- a/main.lua
+++ b/main.lua
@@ -3,6 +3,10 @@ require("mandy")
 
 function main()
      local url=global.url()
+   if not url then
+       
+       return false
+   end
  --   codec=sel_Codec()
      local saveDir=global.dir()
         if saveDir == "23" then