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Editorial Team
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Asked: 2026-06-04T03:06:49+00:00

On my new(ish) Windows 7 x64 development laptop on which I’ve just installed IIS,

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On my new(ish) Windows 7 x64 development laptop on which I’ve just installed IIS, I’m trying to run an .asmx web service compiled with .NET 4.0 and installed with an MSI from a setup project. But whenever I try to execute the service, either from SoapUI or from a .NET WCF client, I get an HTTP error 500 response. And I cannot find any further details about the error. This is what gets into the IIS log:

2012-05-17 21:51:23 10.10.14.155 POST /CwtReservationPushService/ReservationPushService.asmx - 443 - 10.10.14.155 Jakarta+Commons-HttpClient/3.1 500 0 0 121 
2012-05-17 22:03:45 ::1 POST /CwtReservationPushService/ReservationPushService.asmx - 443 - ::1 - 500 0 0 131

but nothing is logged in the system Event Viewer logs that I can find; and nothing is in the C:\Windows\System32\LogFiles\HTTPERR\httperr1.log file about an error 500. I installed the Failed Request Tracing and enabled it, but the only part that seems pertinent in the generated XML is:

ModuleName  ManagedPipelineHandler
Notification    16
HttpStatus  500
HttpReason  Internal Server Error
HttpSubStatus   0
ErrorCode   0
ConfigExceptionInfo     
Notification    MAP_REQUEST_HANDLER
ErrorCode   The operation completed successfully. (0x0)

This is what SoapUI gets back:

HTTP/1.1 500 Internal Server Error
Cache-Control: private
Transfer-Encoding: chunked
Content-Type: text/xml; charset=utf-8
Server: Microsoft-IIS/7.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Fri, 18 May 2012 01:00:14 GMT

Where else can I look to find out what’s causing this error 500? Extensive googling has yielded nothing useful. Or is this error familiar to anyone?

I should mention that browsing to the .asmx successfully yields the usual “The following operations are supported. For a formal definition, please review the Service Description” page, and both SoapUI and my .NET WCF client were able to retrieve the WSDL from that URL to build their proxies.

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1 Answer

  1. Editorial Team

    Oh, man, sometimes all it takes is a drive home, a dinner, an evening with the kids, and a Stackoverflow post.

    I suddenly recalled a similar and totally mysterious problem I had on some older version of Windows a long time ago: all I had to do was install or enable something that I was appalled to find wasn’t installed and enabled by default. And indeed, I went into Programs and Features, Turn Windows features on or off, and browsed to Internet Information Services/World Wide Web Services/Application Development features, and selected checkboxes next to .NET Extensibility and ASP.NET.

    Features Required

    Now I’m getting a beautiful SOAP response back.

    -1, massive fail, boo, un-like, etc. to Microsoft for still not allowing this error to be more transparent.

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