<?xml version="1.0"?>
<api>
  <error code="internal_api_error_DBQueryError" info="Database query error" xml:space="preserve">

#0 /var/www/programmingwiki.de/includes/db/Database.php(538): DatabaseBase->reportQueryError('Key 'cl_sortkey...', 1176, 'SELECT  cl_from...', 'ApiQueryCategor...', false)
#1 /var/www/programmingwiki.de/includes/db/Database.php(874): DatabaseBase->query('SELECT  cl_from...', 'ApiQueryCategor...')
#2 /var/www/programmingwiki.de/includes/api/ApiQueryBase.php(244): DatabaseBase->select(Array, Array, Array, 'ApiQueryCategor...', Array, Array)
#3 /var/www/programmingwiki.de/includes/api/ApiQueryCategoryMembers.php(115): ApiQueryBase->select('ApiQueryCategor...')
#4 /var/www/programmingwiki.de/includes/api/ApiQueryCategoryMembers.php(43): ApiQueryCategoryMembers->run()
#5 /var/www/programmingwiki.de/includes/api/ApiQuery.php(233): ApiQueryCategoryMembers->execute()
#6 /var/www/programmingwiki.de/includes/api/ApiMain.php(595): ApiQuery->execute()
#7 /var/www/programmingwiki.de/includes/api/ApiMain.php(338): ApiMain->executeAction()
#8 /var/www/programmingwiki.de/includes/api/ApiMain.php(322): ApiMain->executeActionWithErrorHandling()
#9 /var/www/programmingwiki.de/api.php(116): ApiMain->execute()
#10 {main}

</error>
</api>