Could not load file or assembly The parameter is incorrect

Question

Recently I met the following exception at C  solution      Error 2   Could not load file or assembly  Newtonsoft Json    Version 3 5 0 0  Culture neutral  PublicKeyToken b9a188c8922137c6  or   one of its dependencies  The parameter is incorrect   Exception from   HRESULT  0x80070057  E INVALIDARG     This does not depend either on my code or on the name of assembly  like Newtonsoft Json in this case    When I delete this dll from the solution the compiler tells about another in the same exception  So I suppose something shoud be turned off on at my PC

User · Answer

I see lot of techies have posted about clearing temporary directories of ASP .Net run-time pertaining to each and every .Net framework hosted on your machine as in this answer. But I believe we should know the clear-cut logistics as to why we need to blindly clear all of temporary working directories of all .Net frameworks. According to me, it should not be the case.

My advice would be that you should try a pin pointed directory clearing approach to resolve this issue. How would you know which directory to clear?

Go to IIS and right click on your website node in left navigation pane to open the context menu. In the context menu point to Manage Application -> Advanced Settings... to open the Advanced Settings window.
Check the Application Pool your website is assigned to. In my case it is DefaultAppPool as shown below:

Now go to Application Pools node in left navigation bar in the IIS. Now check that which .Net CLR Version is being run by your app pool. In my case it is v4.0 as shown below:

Since the CLR version being hosted by my app pool is v4.0, so I prcisely cleared only the temporary files in the folder pertaining to ASP .NET v4.0 only as below:

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files

And that's it. My problem got resolved.

Lesson learnt: This is indicative of the fact that all the temporary files being used by your website aren't scattered across several directories but they are at once place being referred by your app pool. So you need to clear that specific folder only.

User · Answer

I had the same issue here - above solutions didn t work  Problem was with ActionMailer  I ran the following uninstall and install nuget commands  uninstall-package ActionMailer install-package ActionMailer   Resolved my problems  hopefully will help someone else

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You can either clean  build or rebuild your application or simply delete Temporary ASP NET Files at C  Users YOUR USERNAME AppData Local Temp  This works like magic  In my case i had an assembly binding issue saying Could not load file bla bla bla  you can also see solution 2 as http   www codeproject com Articles 663453 Understanding-Clean-Build-and-Rebuild-in-Visual-St

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I had this problem when making controller in MVC  I changed version  net framework  The problem was solved

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Getting fresh set of binaries from Source control helped   Thanks

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Clear all files from temporary folder  C  Users user name AppData Local Temp Temporary ASP NET Files project folder

User · Answer

Looks like a corrupted assembly being referenced   Clear both    the  bin folder of your project the temp folder  should be C  Users your username AppData Local Temp Temporary ASP NET Files in windows 7    and see if the error still happens

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You can also clear the packages directory and allow NuGet to re-download missing packages  it solved the issue for me

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If you are using SQL Server 2012 s Data Tools  which uses the VS2010 shell as at May 1 2013  check your Configuration Manager settings   A server name change from Workflow to xCPWorkflow was enough to produce the exact same The parameter is incorrect  Exception from HRESULT  0x80070057  E INVALIDARG   message

User · Answer

Thanks Alex your second point helped me fix this    It appears that unless you run visual studio as an administrator in Windows 7 it stores your temp files locally rather than C  Windows Microsoft NET Framework v2 0 50727 Temporary ASP NET Files    See following blog post  http   www dotnetscraps com dotnetscraps post Location-of-Temporary-ASPNET-files-in-Vista-or-Windows-7 aspx

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I Had the similar issue while opening Nuget Packet manager  I removed all the temp files and build the project  it worked fine

User · Answer

Clear out the temporary framework files for your project in -  C  WINDOWS Microsoft NET Framework v2 0 50727 Temporary ASP NET Files

User · Answer

Depending on if your are running X64 you might need to clean up a couple more spots   Just cleaning up my user directory was not enough     TEMP  Temporary ASP NET Files C  Windows Microsoft NET Framework v2 0 50727 Temporary ASP NET Files C  Windows Microsoft NET Framework v4 0 30319 Temporary ASP NET Files C  Windows Microsoft NET Framework64 v2 0 50727 Temporary ASP NET Files C  Windows Microsoft NET Framework64 v4 0 30319 Temporary ASP NET Files   This list will grow as if you have other versions of the framework installed

User · Answer

This can happen while referencing COM wrapper dlls  Within your Visual Studio Project  under References  select the COM wrapper dlls being referenced and ensure they have the the following property values   Embed Interop Types   False and  Specific Version   False

User · Answer

I faced same error because application didn t find dependent frameworks in C  Program Files  x86  Reference Assemblies Microsoft Framework  NETFramework  folder  I just repair my Visual studio which added required framework in above location and it working fine

User · Answer

Sometimes you  also  need to clean this folder  C  Windows Temp Temporary ASP NET

User · Answer

The problem relates to the  Net runtime version of a referenced class library  expaned references  select the library and check the  Runtime Version   I had a problem with Antlr3 Runtime  after upgrading my visual studio project to v4 5  I used NuGet to uninstall Microsoft ASP NET Web Optimisation Framework  due to a chain of dependencies that prevented me from uninstalling Antlr3 directly   I then used NuGet to reinstall the Microsoft ASP NET Web Optimisation Framework  This reinstalled the correct runtime versions

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I had to clear      C  Windows Microsoft NET Framework v4 0 30319 Temporary ASP NET Files   Only then did the issue get resolved

User · Answer

To know what to clear for sure - add the following registry key   HKEY LOCAL MACHINE SOFTWARE Microsoft Fusion EnableLog  DWord set to 1     Then you will see output like below  This tells you where asp net is attempting to load your DLLs  Clear this directory   LOG  This bind starts in default load context  LOG  Using application configuration file  c  app AtlasAdvisor web web config LOG  Using host configuration file  C  Windows Microsoft NET Framework v4 0 30319 aspnet config LOG  Using machine configuration file from C  Windows Microsoft NET Framework v4 0 30319 config machine config  LOG  Policy not being applied to reference at this time  private  custom  partial  or location-based assembly bind   LOG  Attempting download of new URL   file    C  Windows Microsoft NET Framework v4 0 30319 Temporary ASP NET Files root 3c8629f7 dfa387b6 Avanade ViddlerNet DLL    LOG  Attempting download of new URL   file    C  Windows Microsoft NET Framework v4 0 30319 Temporary ASP NET Files root 3c8629f7 dfa387b6 Avanade ViddlerNet Avanade ViddlerNet DLL

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If anyone else out there is using the WiX toolset  I discovered that my installer project had a reference to an old project that had recently been removed from the solution  Took me a while to realize since there are a number of projects in the solution I was attempting to build and the message did not indicate which project was failing to build  and clean  which was failing as well

User · Answer

I just delete my application temp data from this path  C  Windows Microsoft NET Framework v4 0 30319 Temporary ASP NET Files   Problem resolve

User · Answer

Just clear this folder   only windows x64      C  Windows Microsoft NET Framework v4 0 30319 Temporary ASP NET Files

User · Answer

Delete all files from these folders       C  Windows Microsoft NET Framework v4 0 30319 Temporary ASP NET Files   C  Windows Microsoft NET Framework64 v4 0 30319 Temporary ASP NET   Files

User · Answer

Clearing C  Windows Microsoft NET Framework v2 0 50727 Temporary ASP NET Files worked for me  Thinking of automating the deletion process to avoid the issue in future

User · Answer

In my case i wanted to compile a COM visible DLL  The problem was that an older version of this DLL was located here   C  Program Files  x86  Microsoft Visual Studio 10 0 Common7 IDE   Thus Visual Studio loaded this version instead of the newly compiled one  as it tried to register it

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In my case  changing the IISExpress port number in my project properties  solved the problem

User · Answer

I had users of Siemens Teamcenter 10 Client for Microsoft Office getting the same error about a different DLL  None of the other answers worked  The solution was to delete the folders in  C  Users  username  AppData Local assembly

[c#] Could not load file or assembly ... The parameter is incorrect

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