Unable to load DLL 'SQLite.Interop.dll'
Periodically I am getting the following exception:
Unable to load DLL 'SQLite.Interop.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
I am using 22.214.171.124. version, installing it with nuget in VS2010, OS Win7 64.
Once exception starts to appear, it appears constantly - in debug and release and running application within or outside VS.
The only way to stop it is logoff and logon. The exception is not thrown and dll is loaded. It can work for days, but then it can break again.
Has anyone seen something like this and is there a solution for it?
I had this problem because a dll I was using had Sqlite as a dependency (configured in NuGet with only the Sqlite core package.). The project compiles and copies all the Sqlite dll-s except the 'SQLite.Interop.dll' (both x86 and x64 folder).
The solution was very simple: just add the Sqlite.Core package as a dependency (with NuGet) to the project you are building/running and the dll-s will be copied.
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I know I'm late to the party but I had this issue right after I pulled down latest x86/x64 today (version 126.96.36.199). My local IIS in VS2012 runs 32bit by default and there's no easy way to switch to x64. My production server runs 64bit.
Anyway I installed the NuGet package to a DLL project and I got this error. What I had to do to get it working I had to install it to the main site project, too. Even if it doesn't touch SQLite classes at all.
My guess is that SQLite uses the entry assembly to detect which version of Interop to load.
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I had this same problem when using SQLite in a WPF project whose platform target was
Any CPU. I fixed it by following the following steps:
- Open the project designer in Visual Studio. Details on how to do it can be found here.
- Click on the Build tab.
- Disable the
Alternatively, you could just set the platform target to
x64. I think this problem is caused by the
System.Data.SQLite library using the platform target to get the location of the 'SQLite.Interop.dll' file.
In case the project designer cannot be reached, just open the project (
*.csproj) file from a text editor and add the value
<Prefer32Bit>false</Prefer32Bit> into the
<PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <ProjectGuid>[Set by Visual Studio]</ProjectGuid> <OutputType>Exe</OutputType> <AppDesignerFolder>Properties</AppDesignerFolder> <RootNamespace>[Set by Visual Studio]</RootNamespace> <AssemblyName>[Set by Visual Studio]</AssemblyName> <TargetFrameworkVersion>v4.5</TargetFrameworkVersion> <FileAlignment>[Set by Visual Studio]</FileAlignment> <!--Add the line below to your project file. Leave everything else untouched--> <Prefer32Bit>false</Prefer32Bit> </PropertyGroup>
Unable to load DLL,  ERROR MESSAGE: Intel Optane(tm) Memory Pinning: Unable to load DLL Unable to load DLL ' iaStorAfsServiceApi.dll ': The specified module could not be � Resolving the Intel Optane Memory Pinning Error 'Unable to load DLL 'iaStorAfsServiceApi.dll'' To help resolve the issue, repair the current Intel® Optane™ memory pinning extensions, by performing the following Open Programs and Features . To open Programs and Features perform the following
So, after adding the NuGet the deployment doesn't copy down the Interops. You can add this to your csproj file and it should fix that behavior:
<PropertyGroup> <ContentSQLiteInteropFiles>true</ContentSQLiteInteropFiles> <CopySQLiteInteropFiles>false</CopySQLiteInteropFiles> <CleanSQLiteInteropFiles>false</CleanSQLiteInteropFiles> <CollectSQLiteInteropFiles>false</CollectSQLiteInteropFiles> </PropertyGroup>
If you look in the source for NuGet for SQLite you can see what these are doing specifically. This allowed me to get a deploy working with ASP.Net Core.
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This is how I fixed it in my project.
It was working, and when a colleague submitted his changes, I received the "Unable to load DLL 'SQLite.Interop.dll'" exception.
Diffing the project's .csproj file, this was in the NON-WORKING version:
<ItemGroup> <Content Include="x64\SQLite.Interop.dll" /> <Content Include="x86\SQLite.Interop.dll" /> </ItemGroup>
And this is what the WORKING version had:
<ItemGroup> <Content Include="x64\SQLite.Interop.dll"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> </Content> <Content Include="x86\SQLite.Interop.dll"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> </Content> </ItemGroup>
After reverting back, I didn't receive the exception. The DLL files were dumped in the appropriate Debug\x64 (etc) folders.
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Unable to load DLL (Module could not be found HRESULT , Steps to fix Error: "Intel Optane(tm) Memory Pinning Unable to Load DLL ' iaStorAfsServiceApi Duration: 4:00 Posted: Nov 25, 2019 “Failed to load dll library.” This kind of error can occur when your Windows operating system fails to locate the DLL library which the system needs to access during startup. It can also occur when the DLL file is not in a directory specified in the path or when the DLL file is corrupted or has gone missing.
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- Yes, it's set to copy always. I have x64 and x86 folders in bin/debug. And it works mostly, but sometimes just stops to work. Probably something is blocking the access to the dll, I will try to find it out next time it stops to work. As I said it may work days without any problems.
- I got this error right out of the box after adding the SQLite nuget package to a new console project. Manually copying SQLite.Interop.dll from the x86 folder up one level allows the app to run. Seems strange to me that this would be so broken.
- @Wayne Yes, this definitely helps. But in my case, we are working together on the project, and my friend is using x86, while me x64 OS. And as I noticed, it just stops to work sometimes. Though it didnt happen to me last month.
- If you download correct binary for SQLite then copy SQLite.Interop.dll into your Release or Debug folder according to your project build option.
- This is such a random bug... sometimes it occurs and sometimes it doesn't for my project. Tried everything.
- Worked for me ! Thanks
- Agreed. I'm using the 'Sqlite.Net PCL' package but found I also needed 'System.Data.SQLite Core (x86/x64)'. I also had to change the project(s) referencing it to use a Platform target of 'x86' or 'x64', rather than 'Any CPU'.
- Tried quite a few solutions posted here, this one actually worked out best.
- How can you add a dependency like that? never done it (VS2013)
- Go to Tools -> NuGet Package Manager -> Manage NuGet Packages for Solution... -> Online -> All. Then Search for sqlite and add System.Data.SQLite Core (x86/x64).
- It worked for me after I added the reference to SQLite Core with NuGet to the main project.
- Adding sqllite.core to main project worked for me on my WPF solution
- I had to do both install-package Sqlite as well as Install-Package System.Data.SQLite.Core into my website even though the db calls are in a library...
- What do you mean by "main site" project? In my case I am doing desktop work. Do you mean the "startup" project?