S2_Nodes_Expert_Exception: Error in condition. Expected ")" near "*end of input*" [(author.NodId=)] // trace

exception 'S2_Nodes_Sql_Parser_Exception' with message 'Expected ")" near "*end of input*" [(author.NodId=)]' in {PATH_SYS}/_core/Main.php:73
Stack trace:
#0 {PATH_SYS}/_core/Main.php(73): S2_Nodes_Sql_Parser->n('Expected ")"')
#1 {PATH_SYS}/_core/Main.php(73): S2_Nodes_Sql_Parser->x(true)
#2 {PATH_SYS}/_core/Main.php(53): S2_Nodes_Sql_Parser->condition('(author.NodId=)')
#3 {PATH_SYS}/_core/Main.php(79): S2_Nodes_Expert->setCondition('author.NodId=')
#4 {PATH_SYS}/_core/Main.php(53): S2_Nodes_Module_Common->getNodes('author.NodId=', 'article', 3, 3, 'date desc', 1, NULL, NULL, 1)
#5 {PATH_PRV}/_mods/ui/views/experts_view.php(44): s2GetNodes(Array)
#6 {PATH_SYS}/_core/Main.php(18): include('/var/www/csi.lo...')
#7 {PATH_SYS}/_core/Main.php(18): S2_Method_Processor->fetch()
#8 {PATH_SYS}/_core/Main.php(53): S2_Method->Fetch('experts_view', 'csi', 'ui', 'views', NULL, false)
#9 {PATH_PRV}/_mods/classes/csi_ui_class.php(108): s2Fetch(Array)
#10 {PATH_PRV}/_mods/experts/view.php(33): csi_UI_Class->render('experts_view', Array, Object(S2_Method))
#11 {PATH_SYS}/_core/Main.php(18): include('/var/www/csi.lo...')
#12 {PATH_SYS}/_core/Main.php(18): S2_Method_Processor->display()
#13 {PATH_SYS}/_core/main.d.php(26): S2_Method->Show()
#14 {PATH_PUB}/_index.php(12): require('/var/www/adm.sk...')
#15 {main}

Next exception 'S2_Nodes_Expert_Exception' with message 'Error in condition. Expected ")" near "*end of input*" [(author.NodId=)]' in {PATH_SYS}/_core/Main.php:53
Stack trace:
#0 {PATH_SYS}/_core/Main.php(79): S2_Nodes_Expert->setCondition('author.NodId=')
#1 {PATH_SYS}/_core/Main.php(53): S2_Nodes_Module_Common->getNodes('author.NodId=', 'article', 3, 3, 'date desc', 1, NULL, NULL, 1)
#2 {PATH_PRV}/_mods/ui/views/experts_view.php(44): s2GetNodes(Array)
#3 {PATH_SYS}/_core/Main.php(18): include('/var/www/csi.lo...')
#4 {PATH_SYS}/_core/Main.php(18): S2_Method_Processor->fetch()
#5 {PATH_SYS}/_core/Main.php(53): S2_Method->Fetch('experts_view', 'csi', 'ui', 'views', NULL, false)
#6 {PATH_PRV}/_mods/classes/csi_ui_class.php(108): s2Fetch(Array)
#7 {PATH_PRV}/_mods/experts/view.php(33): csi_UI_Class->render('experts_view', Array, Object(S2_Method))
#8 {PATH_SYS}/_core/Main.php(18): include('/var/www/csi.lo...')
#9 {PATH_SYS}/_core/Main.php(18): S2_Method_Processor->display()
#10 {PATH_SYS}/_core/main.d.php(26): S2_Method->Show()
#11 {PATH_PUB}/_index.php(12): require('/var/www/adm.sk...')
#12 {main}

Simbix Framework/2.1.6, Apache/2.2.22 (Debian) Aborting...