lib/writeexcel/workbook.rb in writeexcel-1.0.2 vs lib/writeexcel/workbook.rb in writeexcel-1.0.3

@@ -1771,11 +1771,10 @@
   def store_externsheet  # :nodoc:
     record      = 0x0017                   # Record identifier
 
     # Get the external refs
 
-    ext = @ext_refs.keys.sort {|a, b| a.split(':')[0].to_i <=> b.split(':')[0].to_i}
-
+    ext = @ext_refs.keys.sort {|a, b| @ext_refs[a].to_i <=> @ext_refs[b].to_i}
 
     # Change the external refs from stringified "1:1" to [1, 1]
     ext.map! {|e| e.split(/:/).map! {|v| v.to_i} }
 
     cxti        = ext.size                 # Number of Excel XTI structures