I get a An attempt was made to load a program with an incorrect format error on a SQL Server replication project

Question

The exact error is as follows     Could not load file or assembly  Microsoft SqlServer Replication    Version 9 0 242 0  Culture neutral  PublicKeyToken 89845dcd8080cc91    or one of its dependencies  An attempt was made to load a program with   an incorrect format    I ve recently started working on this project again after a two month move to another project   It worked perfectly before  and I ve double checked all the references

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Go to IIS  -  Application Pool -  Advance Settings -  Enable 32-bit Applications

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Changing the Target Framework in project properties from  NET Framework 4 7 1 to 4 6 2 worked for me

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change it to 32-bit  true  it works  if you get this  Length cannot be less than zero  Parameter name  length issue in iis server configuation do the simple thing change the connection string in web config file like your sql server name and server name and restart iis then try to load the page it works

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I ve found the solution   I ve recently upgraded my machine to Windows 2008 Server 64-bit   The SqlServer Replication namespace was written for 32-bit platforms   All I needed to do to get it running again was to set the Target Platform in the Project Build Properties to X86

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We recently had the issue when trying to run the code from Visual Studio  In that case you need to do TOOLS   OPTIONS   Projects and Solutions   WEB PROJECTS and check the  Use the 64 bit version of IIS Express for web sites and projects

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I had this in an MVC5 app in Windows 10 against IIS Express  My solution was the following    Tools       Options       Projects and Solutions      Web Projects      Use the 64 bit version of IIS Express for web sites and projects

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in windows form application I do this  Right-click on Project- Properties- Build- Check Prefer 32-bit checkbox  Thanks all

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For those who get this error in an ASP NET MVC 3 project  within Visual Studio itself   In an ASP NET MVC 3 app I m working on  I tried adding a reference to Microsoft SqlServer BatchParser to a project to resolve a problem where it was missing on a deployment server    Our app uses SMO  the correct fix was to install SQL Server Native Client and a couple other things on the deployment server    Even after I removed the reference to BatchParser  I kept getting the  An attempt was made     error  referencing the BatchParser DLL  on every ASP NET MVC 3 page I opened  and that error was followed by dozens of page parsing errors   If this happens to you  do a file search and see if the DLL is still in one of your project s  bin folders   Even if you do a rebuild  Visual Studio doesn t necessarily clear out everything in all your  bin folders   When I deleted the DLL from the bin and built again  the error went away

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Change the value for Platform Target on your web project s property page to Any CPU

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Delete the temp test directory located here C  Users User  AppData Local Temp VisualStudioTestExplorerExtensions  Set all projects to x64 in Visual Studio  Set the default processor architecture to x64 Test TestSettings Default Processor Architecture     Make sure to clean build the solution file Hope this helps

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If Publishing in Visual Studio 2012 when erroring try unchecking the  Procompile during publishing  option in the Publish wizard

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The answer by baldy below is correct  but you may also need to enable 32-bit applications in your AppPool    Source  http   www alexjamesbrown com uncategorized could-not-load-file-or-assembly-chilkatdotnet2-or-one-of-its-dependencies-an-attempt-was-made-to-load-a-program-with-an-incorrect-format   Whilst setting up an application to run on my local machine  running Vista 64bit  I encountered this error      Could not load file or assembly ChilkatDotNet2 or one of its   dependencies  An attempt was made to load a program with an incorrect   format    Obviously  the application uses ChilKat components  but it would seem that the version we are using  is only the 32bit version   To resolve this error  I set my app pool in IIS to allow 32bit applications  Open up IIS Manager  right click on the app pool  and select Advanced Settings  See below     Then set  Enable 32-bit Applications  to True     All done

[c#] I get a "An attempt was made to load a program with an incorrect format" error on a SQL Server replication project

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