Unable to Debug When Disconnected from Network

Question

I got a new laptop which has Vista Home Premium 64 bit.   I copied some of my VS2008 projects (both asp.net and windows forms).  But when I try to run in debug mode, I get this error:  "Error while trying to run project: Unable to start debugging.  The requested name is valid, but no data of the requested type was found."

Most of these projects will build and run in release mode.  If I try to attach the debugger to the process, I get the same error message as above.

But after further testing, I have discovered the debugging problem only happens with the network cable disconnected.  I often take my laptop on trips and work on airplanes, in the car, etc.  (Not while I'm driving, of course!).  For this purpose, I've installed SQL Server 2008 and have copies of my databases on my laptop.

But this is strange: I plug in my network cable.  Run the project, debugging works.  I disconnect the network cable, debugging STILL works.  Then I reboot (with the network cable unplugged), and now, when I try debugging, I get "The requested name is valid, but no data of the requested type was found."

I read a post here http://www.mycsharpcorner.com/Post.aspx?postID=28 tha this error seems to be related to a network problem.  But why would that matter when I'm working completely locally?

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Selden

Answer 1

Hi Selden

Can you please clarify what the application exactly do, so that we can help to investigate further.

I moved to VS debugger forum for further response.

Thanks.

Figo Fei

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Answer 2

Is the application you are attempting to debug a 32bit or 64bit process?

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Best Regards, Andrew Hall. Visual Studio Debugger.

Answer 3

It's a 32 bit application (I've tried both asp.net apps and windows forms apps, some connect to a database, and some do not.)  Same results with all of them.

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Selden

Answer 4

I finally got this working, and thought I'd share my results in case anyone else experiences this same problem.

Suspecting some sort of problem related to the network card, I tried various things such as resetting the tcp/ip stack, installing updated driver for the network card, and even upgrading the laptop's BIOS.  But none of this worked.

So I finally did a clean install of Windows 7, reinstalled Visual Studio 2008, SP1, and then SQL Server 2008, and now it's working.

So whatever was messed up, an clean install of Windows fixed it (although in this case, I also upgraded from Vista Home Premium 64 bit to Windows 7 Ultimate 64 bit at the same time.)

Now I can debug in Visual Studio with or without the network cable plugged in.

If anyone has any thoughts on what was wrong, I'd love to hear them.

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Selden

Answer 5

Hi Selden

Just for your information that I only knew that VS2010 beta1 and .NET Framework 4.0 beta1 have problems if we do a upgrading installation from Vista to Windows 7.

Thanks.

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