For simple error checking (not necessarily that the link wasn't found): if error? try [site: read web-page][print "Error: page not found"] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, February 08, 2000 2:16 PM To: [EMAIL PROTECTED] Subject: [REBOL] Detecting a broken Link (Server 404 not found) Hi My script now follows all links on a page. Yeah. tags: make block! 200 text: make string! 8000 html-code: [ copy tag ["<" thru ">"] (append tags tag) | copy txt to "<" (append text txt) ] course: %PES102_02.htm coursenew: join %proc/ course page: read course parse page [to "<" some html-code] foreach tag tags [ if parse tag ["<A" thru "HREF=" [{"} copy link to {"} | copy link to ">"] to end ] [ web-page: to url! link site: read web-page if find site "Error" [write/append coursenew reduce [newline link]] ] ] I'm trying to make a simple link validator - that will write all broken links that contain (Server 404 response) to a file. But I can't seem to detect this. My script stops when i reach a broken link with an error message User Error: Target URL could not be retrieved. Server response Http/1.1 404 Not found. The error page of the server contains the word error - so i thought i could just see if the page contained that as a string, but my script just stops when the first broken link is found. How do I trap this and instead of Rebol producing an error message just write the invalid url to a file. Many thanks. Aneesha
