--- a/mcbot/cmds/tvcal.lua	Mon Apr 19 10:20:28 2010 +0200
+++ b/mcbot/cmds/tvcal.lua	Sat Apr 24 10:45:00 2010 +0200
@@ -28,6 +28,10 @@
 local function parse_webpage (url)
     local contents = shcmd("curl "..url)
 
+    if not contents then
+        return nil, "Could not fetch calendar, please try again later!"
+    end
+
     local tabregex = '<td id="d_(%d+_%d+_%d%d%d%d)" class="t?o?day"%s*>%s*\n%s*'..
                      '<table>(.-)</table>'