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-rw-r--r--rrdtool-viewgraph-popup.lsp9
1 files changed, 8 insertions, 1 deletions
diff --git a/rrdtool-viewgraph-popup.lsp b/rrdtool-viewgraph-popup.lsp
index b75085e..d32892a 100644
--- a/rrdtool-viewgraph-popup.lsp
+++ b/rrdtool-viewgraph-popup.lsp
@@ -9,6 +9,13 @@ io.write(html.cfe_unpack(data))
io.write("</span>")
--]]
%>
+<% if (data.width) then %>
<P><%= data.descr %></P>
<IMG SRC='<%= data.output %>' width='<%= data.graph.width or data.option.width %>' height='<%= data.graph.height or data.option.height %>'>
-
+<% else %>
+<H1>No valid output available!</H1>
+<P>Please check if your syntax is right.<BR>
+Read http://oss.oetiker.ch/rrdtool/doc/rrdgraph.en.html for help.</P>
+<HR>
+<P><% io.write(tostring(data.value)) %></P>
+<% end %>