From 00990367a1e06dd0a4773c9a48f1c820f9c456bc Mon Sep 17 00:00:00 2001
From: Dominik Vitt <dominik.vitt.hr@gmail.com>
Date: Wed, 4 Jul 2018 17:32:03 +0200
Subject: [PATCH] Fixed issue #13845: Can't export and then import
 tab-separated text survey file

---
 application/helpers/expressions/em_manager_helper.php | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/application/helpers/expressions/em_manager_helper.php b/application/helpers/expressions/em_manager_helper.php
index 228b97879db..b514de42cff 100644
--- a/application/helpers/expressions/em_manager_helper.php
+++ b/application/helpers/expressions/em_manager_helper.php
@@ -10267,7 +10267,16 @@ static public function &TSVSurveyExport($sid)
                         $row = array();
                         $row['class'] = 'SQ';
                         $row['type/scale'] = 0;
-                        $row['name'] = substr($varName,strlen($rootVarName)+1);
+                        
+                        $subqName = substr($varName,strlen($rootVarName)+1);
+                        // it breaks TSV survey import process if first character for name is numeric
+                        // in such case, characters 'SQ' are added to the front of name, so validation can pass
+                        if (preg_match('/^\d/', subqName) === 1){
+                            $row['name'] = 'SQ'.subqName;
+                        } else {
+                            $row['name'] = subqName;
+                        }
+
                         $row['relevance'] = $SQrelevance;
                         $row['text'] = $subqText;
                         $row['language'] = $lang;