The most recent TWS (858.4) has some serious issues, see:
\nhttp:\/\/www.interactivebrokers.com\/discus\/messages\/2\/34933.html?1145996463<\/a>
\nand
\nhttp:\/\/www.interactivebrokers.com\/discus\/messages\/2\/34913.html?1146089324<\/a><\/p>\n

So don't install it. If you already upgraded to TWS 858 you should install previous version 857 from IB download page:
\nhttp:\/\/www.interactivebrokers.com\/cgi-bin\/jtwsControl.pl?ib_entity=uk<\/a>
\nscroll down to \"standalone downloads - previous versions\".<\/p>\n

Direct link:
\nhttp:\/\/www.interactivebrokers.com\/download\/tws40_install_prev.exe<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

The most recent TWS (858.4) has some serious issues, see: http:\/\/www.interactivebrokers.com\/discus\/messages\/2\/34933.html?1145996463 and http:\/\/www.interactivebrokers.com\/discus\/messages\/2\/34913.html?1146089324 So don’t install it. If you already upgraded to TWS 858 you should install previous version 857 from IB download page: http:\/\/www.interactivebrokers.com\/cgi-bin\/jtwsControl.pl?ib_entity=uk scroll down to “standalone downloads – previous versions”. Direct link: http:\/\/www.interactivebrokers.com\/download\/tws40_install_prev.exe<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[],"_links":{"self":[{"href":"http:\/\/www.amibroker.com\/wordpress\/devlog\/wp-json\/wp\/v2\/posts\/36"}],"collection":[{"href":"http:\/\/www.amibroker.com\/wordpress\/devlog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.amibroker.com\/wordpress\/devlog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.amibroker.com\/wordpress\/devlog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.amibroker.com\/wordpress\/devlog\/wp-json\/wp\/v2\/comments?post=36"}],"version-history":[{"count":0,"href":"http:\/\/www.amibroker.com\/wordpress\/devlog\/wp-json\/wp\/v2\/posts\/36\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.amibroker.com\/wordpress\/devlog\/wp-json\/wp\/v2\/media?parent=36"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.amibroker.com\/wordpress\/devlog\/wp-json\/wp\/v2\/categories?post=36"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.amibroker.com\/wordpress\/devlog\/wp-json\/wp\/v2\/tags?post=36"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}