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I realise this question has been asked many times before and I've tried pretty much every solution out there but I still keep getting this annoying error.

I've tried killing off the WebDev.WebServer40 process as suggested here. I've disabled IPv6 and my firewall, I've also looked inside my "C:\Windows\Microsoft.NET\Framework\v4.0.30319" folder for WebDev.WebServer and it doesn't exist in that directory, even when I download a fresh one and place it there it still doesn't work.

All my other web projects work fine and don't have this problem, but this particular Web Site keeps giving me this error when I try to run it.

I'm using VS2010 and .NET Framework 4.0.

Any help would be greatly appreciated.

Community
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Mohammad Sepahvand
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  • Have you looked at making sure that the folder has appropriate permissions? I don't recall off hand, but that was my issue way back in the day. – Prescott Dec 17 '11 at 08:36
  • Yes but that didn't seem to work either, so I just ended up creating a new solution and placing my old project files and pages in the new one and now it works fine, even my web.config is the same as before yet everything is working. Thanks for your help anyway. – Mohammad Sepahvand Dec 17 '11 at 12:07

5 Answers5

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Open the solution file with a text editor like Notepad++, there is a property of the solution called VWDPort, the value of this property is the port used to publish the website, delete the port leaving the property VWDPort = ""; when you start debugging again, .Net will choose a new FREE port. Problem Solved!

Hope it helps

Juan Arbeláez
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  • That's the real answer. Thanks! – Carlos ABS Mar 04 '15 at 14:21
  • After looking at a few dozen 'solutions', this - alone - was the answer. Although I should note that terminating the WebDev.WebServer.EXE process is also a likely answer if that process is actually running. Just FYI, TCPView (https://technet.microsoft.com/en-us/sysinternals/bb897437) will let you see if something else is already trying to use the currently configured VWDPort and kill the process if appropriate. Thanks!!!! – B H Jan 06 '16 at 16:47
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  1. Replace WebDev.WebServer.exe with another exe C:\Program Files (x86)\Common Files\microsoft shared\DevServer\9.0\WebDev.WebServer.exe

  2. Restart your machine .

I tried every thing before restarting the machine but all failed.

You can use this exe from http://www.4shared.com/rar/4CXREKtb/WebDevWebServer.html

Spectre87
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EygptDBA
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I also had the same problem, what I did is I just terminate the "WebDev.WebServer40.EXE" process then restart the Project and its worked.

Ibad Baig
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I had to move my DevServer folder to C:\Program Files\Common Files\microsoft shared\DevServer dir.
from its current location C:\Program Files (x86)\Common Files\microsoft shared\DevServer After doing so the problem was fixed :)
Originally posted here by spankster:
http://forums.asp.net/post/2426735.aspx

Hossein
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I just restarted my machine and it worked.

Shaiwal Tripathi
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