Common TestLink Errors


In this post, we look at some commons TestLink errors and what causes them.

1. Unable to connect error.

2. Back end DB error.

Unable to connect


Unable to connect

Firefox can’t establish a connection to the server at localhost.

The site could be temporarily unavailable or too busy. Try again in a few moments. If you are unable to load any pages, check your computer’s network connection.
If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.


Unable to connect


Cause:  Apache server not started or didn’t start properly.


Start the Apache server and have a look at the Apache error.log file. This will fix the issue. There shouldn’t be any exceptions or errors in the log.



Apache server start


DB Access Error


mysqli_real_escape_string(): invalid object or resource mysqli in C:\xampp\htdocs\testlink\third_party\adodb\drivers\

 DB Access Error - debug_print_backtrace() OUTPUT START


:  MySQL server is not started or didn't start properly.


Start the MySQL server and have a look at  mysql_error.log file. This will fix the issue. Furthermore, you can also check if any tables are missing in the back-end. PHP Admin page is a handy tool for investigating backend MySQL errors.

TestLink MySQL Schema


In this case, the restarting MySQL server solved the error.


TestLink Login Page


Fixing Folder permission errors on Linux:


TestLink Install Errors

Follow the instructions in the below link to fix the read/write errors on Linux machine

Common Exceptions