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SQL SERVER – FIX : ERROR : is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)

Pinal Dave
SQL, SQL Server, SQL Tips and Tricks
6 Comments

Just a day ago, one of my friend sent me email requesting help with following error:

is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)

In fact this is not SQL Server error but it is of .NET application. The solution of this error is just changing configuration of IIS7.

Fix/Solution/Workaround:

Go to IIS.
Click on Application Pool.
Look for your web application in application pool.
Go to Advanced Settings by right clicking on previously selected application pool.
Enable 32-Bit Applications by checking it.

Reference : Pinal Dave (https://blog.sqlauthority.com)

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6 Comments. Leave new

  • Chandu
    April 30, 2009 11:34 am

    This is cool for the information. I have iis 5.0 installed. Can you let me know any solution with this. Probably I think (not sure) that this error is from IIS. Instead this is from .NET framework’s Dr. Watson’s debugger. And this is a link from microsoft website for the above error.

    Last but not least. I am not an expert in english grammer. Can you please check the grammer mistake on the first line Pival. I noticed this issue in one of my grammer books that I read these days.

    Reply
  • Uday
    April 15, 2015 5:43 pm

    Hi Dave,

    I followed the same steps but still getting the same error that “is not a valid win32”

    please help

    Regards,
    Uday Nayak

    Reply
  • Abel
    January 13, 2017 8:27 pm

    Thanks very much for your information..

    Reply
  • Ray
    February 1, 2017 5:19 pm

    please i still can not locate IIS manager in my Administrative tools. Please how can i get it there. thanks

    Reply

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Pinal Dave is an SQL Server Performance Tuning Expert and independent consultant with over 22 years of hands-on experience. He holds a Masters of Science degree and numerous database certifications.

Pinal has authored 14 SQL Server database books and 88 Pluralsight courses. To freely share his knowledge and help others build their expertise, Pinal has also written more than 5,800 database tech articles on his blog at https://blog.sqlauthority.com.

Pinal is an experienced and dedicated professional with a deep commitment to flawless customer service. If you need help with any SQL Server Performance Tuning Issues, please feel free to reach out at pinal@sqlauthority.com.

Pinal is also a CrossFit Level 1 Trainer (CF-L1) and CrossFit Level 2 Trainer (CF-L2).

Nupur Dave is a social media enthusiast and an independent consultant. She primarily focuses on the database domain, helping clients build short and long-term multi-channel campaigns to drive leads for their sales pipeline.

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