Error message

• Notice: Trying to get property of non-object in author_view_inst_article() (line 64 of /var/www/sites/idsi/ibn2014/trunk/sites/all/modules/author_view/author_view_inst_art.page.inc).
• Notice: Trying to get property of non-object in author_view_inst_article() (line 64 of /var/www/sites/idsi/ibn2014/trunk/sites/all/modules/author_view/author_view_inst_art.page.inc).
• Notice: Undefined index: pg in author_view_inst_article() (line 379 of /var/www/sites/idsi/ibn2014/trunk/sites/all/modules/author_view/author_view_inst_art.page.inc).