From 6bfea3b652d1169bc6078e3659435b03bde796fd Mon Sep 17 00:00:00 2001
From: Thomas White <tmswhite@users.sourceforge.net>
Date: Wed, 20 Jun 2012 10:31:26 -0400
Subject: [PATCH] Fixed issue #06240: conversion of conditions to relevance can
 fail for multiple choice tests during some upgrades.

---
 application/helpers/expressions/em_manager_helper.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/application/helpers/expressions/em_manager_helper.php b/application/helpers/expressions/em_manager_helper.php
index 92e4a8a1e7d..bf9425d8df5 100644
--- a/application/helpers/expressions/em_manager_helper.php
+++ b/application/helpers/expressions/em_manager_helper.php
@@ -898,7 +898,7 @@ public static function ConvertConditionsToRelevance($surveyId=NULL, $qid=NULL)
                 else
                 {
                     // Conditions uses ' ' to mean not answered, but internally it is really stored as ''.  Fix this
-                    if ($value === '" "') {
+                    if ($value === '" "' || $value == '""') {
                         if ($row['method'] == '==')
                         {
                             $relOrList[] = "is_empty(" . $fieldname . ")";