Update test case execution (by uploading xml file) in testlink with Testcase Unique custom field -

Update test case execution (by uploading xml file) in testlink with Testcase Unique custom field -

i have configured test link (version 1.9.12), looks have been trying update test case execution uploading xml file. works fine if xml uses test case id (external or internal) utilize test case name or custom field. have searched in web , found link(given below) have attached files has bits , pieces of code modify in existing testlink project. after going through .diff files have understood have modify couple of existing files (mentioned below) in testlink.

/lib/functions/testcase.class.php /lib/results/resultsimport.php

the xml have been importing shown below, can help me out. many in advance. class="snippet-code-html lang-html prettyprint-override"><?xml version="1.0" encoding="utf-8" ?> <!-- testlink - www.teamst.org - xml allow results import --> <results> <testproject name="target" prefix="dt_target" /> <testplan name="testplan1" /> <build name="test build auto" /> <testcase external_id="dt_target-730"> <!--<testcase name="mytestcasename1">--> <linkby custom_field="checkmate_id" value="mytestcasecf1" /> <result>f</result> <notes>yyyyyyyyyyyy</notes> <timestamp></timestamp> </testcase> </results>

xml testlink