diff --git a/admin/index.php b/admin/index.php
index a206a273..8160a618 100644
--- a/admin/index.php
+++ b/admin/index.php
@@ -128,6 +128,7 @@ include ("../functions/functions.operator.php");
 		  <li class="has_sub"><a href="" class=""><i class="fa fa-book fa-lg"></i><span><?php print T_("Samples") ;?></span></a>
               <ul style="<?php if ($g == 2) echo "display:block";?>">
                 <li><a href="?g=2&amp;page=import.php"><i class="fa fa-upload fa-fw"></i><?php print T_("Import a sample file") ;?></a></li>
+                <li><a href="?g=2&amp;page=updatesample.php"><i class="fa fa-plus fa-fw"></i><?php print T_("Add to a sample file") ;?></a></li>
                 <li><a href="?g=2&amp;page=samplelist.php"><i class="fa fa-list fa-fw"></i><?php print T_("Sample management") ;?></a></li>
                 <li><a href="?g=2&amp;page=samplesearch.php"><i class="fa fa-search fa-fw"></i><?php print T_("Search the sample") ;?></a></li>
                 <li><a href="?g=2&amp;page=assignsample.php"><i class="fa fa-link fa-fw"></i><?php print T_("Assign samples to questionnaires") ;?></a></li>
diff --git a/admin/samplelist.php b/admin/samplelist.php
index 29e7acc1..41fecc9a 100644
--- a/admin/samplelist.php
+++ b/admin/samplelist.php
@@ -322,6 +322,7 @@ if (isset($_GET['edit']) )
 
 	print "<div class='col-sm-8'><h3>" . T_("Sample") . ":&emsp;" . $sd['description'] . "&emsp;<small>ID <b> $sample_import_id</b> </small></h3></div>";
 	print "<div class='col-sm-2'><a href='samplesearch.php?sample_import_id=$sample_import_id' class='btn btn-default' ><i class='fa fa-search fa-lg fa-fw text-primary'></i>&emsp;" . T_("Search this sample") . "</a></div>";
+	print "<div class='col-sm-2'><a href='updatesample.php?sample_import_id=$sample_import_id' class='btn btn-default' ><i class='fa fa-plus fa-lg fa-fw text-primary'></i>&emsp;" . T_("Add to this sample") . "</a></div>";
 	print "<div class='clearfix'></div>";
 
 	if($sd['enabled'] == 0){
@@ -484,6 +485,7 @@ $sql = "SELECT
 		CONCAT('<a href=\'\' class=\'btn btn-default \' data-toggle=\'confirmation\' data-href=\'?delete_sample=',sample_import_id,'\' data-title=\'" . TQ_("ARE YOU SURE?") . "\' data-btnOkLabel=\'" . TQ_("Yes") . "\' data-btnCancelLabel=\'" . TQ_("Cancel") . "\' ><i class=\'fa fa-trash fa-lg fa-fw text-danger \' data-toggle=\'tooltip\' title=\'" . TQ_("DELETE SAMPLE") . "\'></i></a>')
 	END as delsample,
 	CONCAT('<a href=\'samplesearch.php?sample_import_id=',sample_import_id,'\' class=\'btn btn-default\' data-toggle=\'tooltip\' title=\'" . TQ_("Search the sample") . "',sample_import_id,'\'><i class=\'fa fa-search fa-lg fa-fw text-primary\'></i></a>')  as ssearch,
+	CONCAT('<a href=\'updatesample.php?sample_import_id=',sample_import_id,'\' class=\'btn btn-default\' data-toggle=\'tooltip\' title=\'" . TQ_("Add to the sample") . "',sample_import_id,'\'><i class=\'fa fa-plus fa-lg fa-fw text-primary\'></i></a>')  as sadd,
 	CONCAT('<a href=\'callhistory.php?sample_import_id=',sample_import_id,'\' class=\'btn btn-default\' data-toggle=\'tooltip\' title=\'" . TQ_("Call history"). "&ensp;\n" . TQ_("sample"). "&ensp;',sample_import_id,'\'><i class=\'fa fa-phone fa-lg text-primary\'></i></a>') as calls,
 	CONCAT('<h4>',description,'&emsp;</h4>') as description,
 	CONCAT('<h4 class=\'fa fa-lg text-primary pull-right\'>',(SELECT COUNT( DISTINCT`sample_var`.sample_id) FROM `sample_var`, `sample` WHERE `sample`.sample_id = `sample_var`.sample_id AND `sample`.import_id = sample_import_id ),'&emsp;</h4>') as cnt
@@ -497,7 +499,7 @@ echo "<div class='form-group'>
 		<a href='' onclick='history.back();return false;' class='btn btn-default'><i class='fa fa-chevron-left fa-lg text-primary'></i>&emsp;" . T_("Go back") . "</a>
 		<a href='import.php' class='btn btn-default col-sm-offset-4' ><i class='fa fa-upload fa-lg'></i>&emsp;" . T_("Import a sample file") . "</a>
 	</div>";
-$columns = array("id","description","cnt","status","enabledisable","calls","did","ssearch","delsample"); //"vp","rname",
+$columns = array("id","description","cnt","status","enabledisable","calls","did","ssearch","sadd","delsample"); //"vp","rname",
 //$titles = array(T_("ID"),T_("Sample"),T_("Records"), T_("Call History"),T_("Enable/Disable"), T_("Status"), T_("Deidentify"), T_("View"), T_("Rename"), T_("Search"), T_("Delete sample")); 
 xhtml_table($rs,$columns, false, "table-hover table-condensed ");
 
diff --git a/functions/functions.import.php b/functions/functions.import.php
index 440abed9..84aa3faa 100644
--- a/functions/functions.import.php
+++ b/functions/functions.import.php
@@ -53,6 +53,46 @@ function only_numbers($str)
 	return preg_replace("/[^0-9]/", "",$str);
 }
 
+/**
+ * Verify that a provided file matches an existing sample file
+ */
+function verify_file($file,$import_id)
+{
+  $row = get_first_row($file);
+
+  global $db;
+
+  $sql = "SELECT var,type,var_id
+          FROM sample_import_var_restrict
+          WHERE sample_import_id = $import_id
+          ORDER BY var_id ASC";
+
+  $sivr = $db->GetAll($sql);
+
+  $count = 0;
+
+  $nrow = array();
+
+  foreach($row as $key => $val) {
+    $nrow[$key] = strtolower(str_replace(array(" ,",", ",",","  "," "),"_", $val));
+ 
+  }
+
+  foreach($sivr as $r) {
+    $var = strtolower($r['var']);
+    if ($var != $nrow[$count]) {
+      return false;
+    }
+
+    $count++;
+  }
+
+  //column headings match database
+  if ($count == count($row)) {
+    return true;
+  }
+}
+
 
 /**
  * Verify fields in a CSV file
@@ -188,6 +228,38 @@ function get_first_row($file)
 	return $data;
 }
 
+/** 
+ * Add records to an existing sample
+ */
+function update_file($file,$import_id)
+{
+  global $db;
+
+	$db->StartTrans();
+
+	$selected_type = array();
+	$selected_name = array();
+	$sirv_id = array();
+
+  $sql = "SELECT var_id,var,type
+          FROM sample_import_var_restrict
+          WHERE sample_import_id = $import_id
+          ORDER BY var_id ASC";
+
+  $sivr = $db->GetAll($sql);
+
+  $count = 1;
+  foreach($sivr as $s) {
+    $selected_type[$count] = $s['type'];
+    $selected_name[$count] = $s['var'];
+    $sirv_id[$count] = $s['var_id'];
+    $count++;
+  }
+
+  add_to_sample($file,$import_id,$selected_type,$selected_name,$sirv_id,2);
+
+  return $db->CompleteTrans();
+}
 
 /**
  * Import a CSV file to the sample database
@@ -202,10 +274,6 @@ function get_first_row($file)
  */
 function import_file($file, $description, $fields, $firstrow = 2)
 {
-
-	$row = 1;
-	$handle = fopen($file, "r");
-
 	//import into database
 
 	global $db;
@@ -246,6 +314,23 @@ function import_file($file, $description, $fields, $firstrow = 2)
 		}
 	}
 
+  add_to_sample($file,$id,$selected_type,$selected_name,$sirv_id,$firstrow);
+
+  return $db->CompleteTrans();	
+}
+
+/**
+ * add_to_sample
+ *
+ * Add records to the sample file
+ *
+ */
+function add_to_sample($file,$id,$selected_type,$selected_name,$sirv_id,$firstrow) 
+{
+  global $db;
+
+  $db->StartTrans();
+
 	/**
 	 * create an ordered index of columns that contain data for obtaining the timezone
 	 * type of 5,4,3,2 preferred
@@ -253,6 +338,9 @@ function import_file($file, $description, $fields, $firstrow = 2)
 	
 	arsort($selected_type);
 
+	$row = 1;
+	$handle = fopen($file, "r");
+
 	$imported = 0;
 
 	while (($data = fgetcsv($handle)) !== FALSE) 
@@ -346,9 +434,9 @@ function import_file($file, $description, $fields, $firstrow = 2)
 	unlink($file);
 
 	return $db->CompleteTrans();
-	
 }
 
+
 /**
  * Get the timezone given the sample value and type
  *