Could you post the full error please?
Error Info
ErrorException: Undefined index: user_id - library\Waindigo\Metadata\Extend\XenForo\Model\Thread.php:362
Generated By: Highlander, Today at 2:12 AM
Stack Trace
#0 C:\mysite\library\Waindigo\Metadata\Extend\XenForo\Model\Thread.php(362): XenForo_Application::handlePhpError(8, 'Undefined index...', 'C:\\inetpub2\\ihe...', 362, Array)
#1 C:\mysite\library\Waindigo\Metadata\Extend\XenForo\ControllerPublic\Forum.php(30): Waindigo_Metadata_Extend_XenForo_Model_Thread->canEditThreadTitleMetadata(Array, Array)
#2 C:\mysite\library\Andy\SimilarThreads\ControllerPublic\Forum.php(13): Waindigo_Metadata_Extend_XenForo_ControllerPublic_Forum->actionCreateThread()
#3 C:\mysite\library\XenForo\FrontController.php(347): Andy_SimilarThreads_ControllerPublic_Forum->actionCreateThread()
#4 C:\mysite\library\XenForo\FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#5 C:\mysite\index.php(13): XenForo_FrontController->run()
#6 {main}
Request State
array(3) {
["url"] => string(71) "
http://www.mysite.com/forums/distributed-computing.41/create-thread"
["_GET"] => array(0) {
}
["_POST"] => array(0) {
}
}
=====
I have two pages just like this when creating threads in various places