.. include:: ../../Includes.txt .. _user-debugging: Debugging ^^^^^^^^^ There are many potential sources of error during synchronization, from wrong mapping configurations to missing user rights to PHP errors in user functions. When a synchronization is launched from the BE module a status is displayed when the operation is finished. The extension tries to report at best on the success or failure of the operation. Turning on the "debug" mode (see the :ref:`Configuration chapter `) will provide additional information. As described in the :ref:`Configuration chapter `, it is also possible to receive a detailed report by email. It will contain a general summary of what happened during synchronization, but also all error messages logged by the TYPO3 Core Engine, if any.