Unknown error type: [8] Trying to get property of non-object
#0  bt_error_handler(8, Trying to get property of non-object, /mnt/persist/www/docroot/sites/all/modules/Bt/bt.module, 419, Array ([category] => BT_Category Object ([] => BT_Category,[] => bt_category,[] => category_id,[] => Array ([category_id] => Array ([null] => ),[parent_id] => Array ([type] => BT_Api_Db_Category),[alias_id] => Array ([type] => BT_Api_Db_Category),[title] => Array ([null] => ),[slug] => Array (),[image] => Array (),[sort] => Array ([default] => ),[nb_articles] => Array ([default] => 0),[nb_categories] => Array ([default] => 0),[last_update] => Array (),[created] => Array ()),[] => Array ([category_property] => BT_CategoryProperty,[category_text] => BT_CategoryText),[] => Array ([category_id] => 1230,[parent_id] => 1200,[alias_id] => ,[title] => Plane skæreskiver jern,[slug] => afkortning--skiver--plane-skareskiver-jern,[image] => Skaereskive_ST_plan.jpg,[sort] => ,[nb_articles] => 42,[nb_categories] => 0,[last_update] => 2018-09-19 17:31:54,[created] => 2018-09-19 17:31:53,[category_property] => BT_Api_Db_Collection Object ([0] => BT_CategoryProperty Object ([] => BT_CategoryProperty,[] => bt_category_property,[] => category_property_id,[] => Array ([category_property_id] => Array ([null] => 1,[ai] => 1),[category_id] => Array ([null] => ,[type] => BT_Category),[property] => Array ([null] => ),[value] => Array (),[sort] => Array (),[lang] => Array ()),[] => Array (),[] => Array ([category_property_id] => 16299252,[category_id] => 1230,[property] => template,[value] => 1,[sort] => ,[lang] => ),[] => 1,[] => 1,[] => ),[1] => BT_CategoryProperty Object ([] => BT_CategoryProperty,[] => bt_category_property,[] => category_property_id,[] => Array ([category_property_id] => Array ([null] => 1,[ai] => 1),[category_id] => Array ([null] => ,[type] => BT_Category),[property] => Array ([null] => ),[value] => Array (),[sort] => Array (),[lang] => Array ()),[] => Array (),[] => Array ([category_property_id] => 16299253,[category_id] => 1230,[property] => page_title,[value] => ,[sort] => ,[lang] => ),[] => 1,[] => 1,[] => )),[category_text] => BT_Api_Db_Collection Object ([0] => BT_CategoryText Object ([] => BT_CategoryText,[] => bt_category_text,[] => category_text_id,[] => Array ([category_text_id] => Array ([null] => 1,[ai] => 1),[category_id] => Array ([null] => ,[type] => BT_Article),[title] => Array ([default] => ,[null] => 1),[type] => Array ([default] => default,[null] => ),[text] => Array (),[sort] => Array (),[lang] => Array ()),[] => Array (),[] => Array ([category_text_id] => 3099290,[category_id] => 1230,[title] => Description,[type] => description,[text] => Rapoflex skæreskiver er vævsarmerede bakelitbundne skiver, specielt beregnet til skæring i stål. Skiverne er plane (T41), hvilket betyder at skiven er helt tæt på vinkelsliberen/Afkorteren.,[sort] => 0,[lang] => da),[] => 1,[] => 1,[] => ))),[] => 1,[] => 1,[] => ),[article] => ,[breadcrumb] => Array ([0] => Hjem,[1] => Afkortning,[2] => Skiver,[3] => Plane skæreskiver jern))) called at [/mnt/persist/www/docroot/sites/all/modules/Bt/bt.module:419]
#1  bt_article(BT_Category Object ([] => BT_Category,[] => bt_category,[] => category_id,[] => Array ([category_id] => Array ([null] => ),[parent_id] => Array ([type] => BT_Api_Db_Category),[alias_id] => Array ([type] => BT_Api_Db_Category),[title] => Array ([null] => ),[slug] => Array (),[image] => Array (),[sort] => Array ([default] => ),[nb_articles] => Array ([default] => 0),[nb_categories] => Array ([default] => 0),[last_update] => Array (),[created] => Array ()),[] => Array ([category_property] => BT_CategoryProperty,[category_text] => BT_CategoryText),[] => Array ([category_id] => 1230,[parent_id] => 1200,[alias_id] => ,[title] => Plane skæreskiver jern,[slug] => afkortning--skiver--plane-skareskiver-jern,[image] => Skaereskive_ST_plan.jpg,[sort] => ,[nb_articles] => 42,[nb_categories] => 0,[last_update] => 2018-09-19 17:31:54,[created] => 2018-09-19 17:31:53,[category_property] => BT_Api_Db_Collection Object ([0] => BT_CategoryProperty Object ([] => BT_CategoryProperty,[] => bt_category_property,[] => category_property_id,[] => Array ([category_property_id] => Array ([null] => 1,[ai] => 1),[category_id] => Array ([null] => ,[type] => BT_Category),[property] => Array ([null] => ),[value] => Array (),[sort] => Array (),[lang] => Array ()),[] => Array (),[] => Array ([category_property_id] => 16299252,[category_id] => 1230,[property] => template,[value] => 1,[sort] => ,[lang] => ),[] => 1,[] => 1,[] => ),[1] => BT_CategoryProperty Object ([] => BT_CategoryProperty,[] => bt_category_property,[] => category_property_id,[] => Array ([category_property_id] => Array ([null] => 1,[ai] => 1),[category_id] => Array ([null] => ,[type] => BT_Category),[property] => Array ([null] => ),[value] => Array (),[sort] => Array (),[lang] => Array ()),[] => Array (),[] => Array ([category_property_id] => 16299253,[category_id] => 1230,[property] => page_title,[value] => ,[sort] => ,[lang] => ),[] => 1,[] => 1,[] => )),[category_text] => BT_Api_Db_Collection Object ([0] => BT_CategoryText Object ([] => BT_CategoryText,[] => bt_category_text,[] => category_text_id,[] => Array ([category_text_id] => Array ([null] => 1,[ai] => 1),[category_id] => Array ([null] => ,[type] => BT_Article),[title] => Array ([default] => ,[null] => 1),[type] => Array ([default] => default,[null] => ),[text] => Array (),[sort] => Array (),[lang] => Array ()),[] => Array (),[] => Array ([category_text_id] => 3099290,[category_id] => 1230,[title] => Description,[type] => description,[text] => Rapoflex skæreskiver er vævsarmerede bakelitbundne skiver, specielt beregnet til skæring i stål. Skiverne er plane (T41), hvilket betyder at skiven er helt tæt på vinkelsliberen/Afkorteren.,[sort] => 0,[lang] => da),[] => 1,[] => 1,[] => ))),[] => 1,[] => 1,[] => ), )
#2  call_user_func_array(bt_article, Array ([0] => BT_Category Object ([] => BT_Category,[] => bt_category,[] => category_id,[] => Array ([category_id] => Array ([null] => ),[parent_id] => Array ([type] => BT_Api_Db_Category),[alias_id] => Array ([type] => BT_Api_Db_Category),[title] => Array ([null] => ),[slug] => Array (),[image] => Array (),[sort] => Array ([default] => ),[nb_articles] => Array ([default] => 0),[nb_categories] => Array ([default] => 0),[last_update] => Array (),[created] => Array ()),[] => Array ([category_property] => BT_CategoryProperty,[category_text] => BT_CategoryText),[] => Array ([category_id] => 1230,[parent_id] => 1200,[alias_id] => ,[title] => Plane skæreskiver jern,[slug] => afkortning--skiver--plane-skareskiver-jern,[image] => Skaereskive_ST_plan.jpg,[sort] => ,[nb_articles] => 42,[nb_categories] => 0,[last_update] => 2018-09-19 17:31:54,[created] => 2018-09-19 17:31:53,[category_property] => BT_Api_Db_Collection Object ([0] => BT_CategoryProperty Object ([] => BT_CategoryProperty,[] => bt_category_property,[] => category_property_id,[] => Array ([category_property_id] => Array ([null] => 1,[ai] => 1),[category_id] => Array ([null] => ,[type] => BT_Category),[property] => Array ([null] => ),[value] => Array (),[sort] => Array (),[lang] => Array ()),[] => Array (),[] => Array ([category_property_id] => 16299252,[category_id] => 1230,[property] => template,[value] => 1,[sort] => ,[lang] => ),[] => 1,[] => 1,[] => ),[1] => BT_CategoryProperty Object ([] => BT_CategoryProperty,[] => bt_category_property,[] => category_property_id,[] => Array ([category_property_id] => Array ([null] => 1,[ai] => 1),[category_id] => Array ([null] => ,[type] => BT_Category),[property] => Array ([null] => ),[value] => Array (),[sort] => Array (),[lang] => Array ()),[] => Array (),[] => Array ([category_property_id] => 16299253,[category_id] => 1230,[property] => page_title,[value] => ,[sort] => ,[lang] => ),[] => 1,[] => 1,[] => )),[category_text] => BT_Api_Db_Collection Object ([0] => BT_CategoryText Object ([] => BT_CategoryText,[] => bt_category_text,[] => category_text_id,[] => Array ([category_text_id] => Array ([null] => 1,[ai] => 1),[category_id] => Array ([null] => ,[type] => BT_Article),[title] => Array ([default] => ,[null] => 1),[type] => Array ([default] => default,[null] => ),[text] => Array (),[sort] => Array (),[lang] => Array ()),[] => Array (),[] => Array ([category_text_id] => 3099290,[category_id] => 1230,[title] => Description,[type] => description,[text] => Rapoflex skæreskiver er vævsarmerede bakelitbundne skiver, specielt beregnet til skæring i stål. Skiverne er plane (T41), hvilket betyder at skiven er helt tæt på vinkelsliberen/Afkorteren.,[sort] => 0,[lang] => da),[] => 1,[] => 1,[] => ))),[] => 1,[] => 1,[] => ),[1] => )) called at [/mnt/persist/www/docroot/includes/menu.inc:527]
#3  menu_execute_active_handler() called at [/mnt/persist/www/docroot/index.php:21]