The mbstring library is a PHP library to be able to convert char sets from one language to another. You need it if you want to run LimeSurvey. To check if it is already installed open the URL http:////admin/install/phpinfo.php from the web browser. A lot of information will be shown. Search for the string ‘mbstring’ under the Configuration section. If you find the mbstring section then all should be well and you can continue on with your LimeSurvey installation! If you don’t find the mbstring section you might have a problem on your hands. There are three possible scenarios: • If it’s your providers server: Ask your provider to activate that extension in PHP or how to activate it – if you have a good administration panel for your server you may be able to activate it yourself. • If it’s your own Linux server: You may have to re-compile PHP and include the mbstring library. Ask the Linux experts how to do that. In most Linux versions today you can