I have created this script for selecting open paths in illustrator cs6 as the graffix plugin is not working under CS6.
Just save the following text in /Applications/Adobe Illustrator CS6/Presets/en_US/Scripts/Select Open Paths.js
if (documents.length > 0 && activeDocument.pathItems.length > 0){
var allPaths = activeDocument.pathItems;
var allPathsCount = allPaths.length;
var openPathsAreLocked = false;
var lockedOpenPaths = 0;
var locked = false;
for (var i=0; i < allPathsCount; i++){
allPaths[ i ].selected = false;
if( ! allPaths[ i ].closed){
try{
allPaths[ i ].selected = true;
} catch (e) {
openPathsAreLocked = true;
lockedOpenPaths++;
}
}
}
if (openPathsAreLocked) alert (lockedOpenPaths + " open paths are locked or hidden (or their layer is locked or hidden) and cannot be selected");
}