lib/hotch.rb in hotch-0.4.1 vs lib/hotch.rb in hotch-0.4.2

@@ -84,10 +84,10 @@
     end
   end
 
   def convert_svg(dir, dot, file)
     svg = File.join(dir, file)
-    system("dot", "-Tsvg", "-o", svg, dot) or raise "dot failed"
+    system("dot", "-Tsvg", "-o", svg, dot) or raise "dot: command not found. Please install graphviz"
     svg
   end
 
   def write_file(dir, file)
     path = File.join(dir, file)