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  • Blog Post: Automatic postback does not fire for TextBox control

    I recently come across an interesting request which read like this: A simple webapplication with one Textbox and one label. The Textbox has Autopostback=”true” and has an event listener attached to the TextChanged event. In the TextChanged event the label’s text is set to the text in the textbox. A javascript...
  • Blog Post: How many application pools can you cope with?

    This is an interesting question I have to admit I had not thought to until we got a case from a customer whom was in trouble with his production servers: how many application pools can you run on IIS? Event better, how many w3wp.exe instances can the OS cope with? As quite often happens in our job, the...
  • Blog Post: Don't let IE local cache drive you crazy!

    I stumbled across this issue multiple times during my life of web developer (which begun about 10 years ago), it appeared every now and then to complicate things when I was in the middle of a heavy debugging sessions and doing frequent changes to my pages; I was expecting some kind of results but despite...
  • Blog Post: A Trappable error C0000005 occured in an external object, the script cannot continue running

    This is an Access Violation exception which can have different causes (MDAC bad installation, third party components such as Oracle dlls which Oracle has a fix for etc...), but in the specific case I had some time ago this was due to a corrupted Windows Scripting Host engine. This was a classic ASP application...
  • Blog Post: Server Error 500, unable to create new session

    I saw this problem reported on a Windows 2000 Server (IIS 5.0), I've not checked if the same could also happen on IIS 6/7... The application is build on classic ASP pages and the error appeared about once per day on a test server; when browsing the user got a message reading " unable to create new...
  • Blog Post: Session_OnEnd not firing after applying Windows 2003 Service Pack 2

    We very recently discovered a bug in classic ASP (asp.dll) you get installing the Service Pack 2 for Windows 2003; removing the SP2 makes it work again as expected, so this is a regression bug introduced by the service pack itself. Basically with SP2 installed, the Session_OnEnd() method in classic ASP...
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