Hello, I have a similar issue asked here: http://stackoverflow.com/questions/2409406/call-to-drupal-render-returns-nul... but on my case, I think the function is not called since if I put a file_put_contents before the access check, then nothing is written to that temp-file. Before call the drupal_render function I check the element passed is well-formed, and apparently it is. #foo_site_theme.inc function theme_citroen_site_entity($variables) { file_put_contents("/tmp/community.log", "\nSTART\n"); file_put_contents("/tmp/community.log", print_r($variables['element'], true), FILE_APPEND); return drupal_render($variables['element']); } #common.inc function drupal_render(&$elements) { file_put_contents("/tmp/community.log", "\nhola caracola\n", FILE_APPEND); // Early-return nothing if user does not have access. if (empty($elements) || (isset($elements['#access']) && !$elements['#access'])) { return ''; } ... ... ... } So, even if my problem could be about the access permission, I wonder I might see the string "hola caracola" at this temp-log-file. The only conclusion I can get is the function drupal_render is never called, what surprises me and I can't understand why. Also I tried to put a syntax error inside drupal_render function, and drupal works without errors. If I put the same typo inside theme_citroen_site_entity function, then I can see this typo-error Anybody could point me to the right direction? Thanks in advance.