I have a perfectly working windows forms C# .NET 4 application that uses a SQLite3 database file to store data and display forms.
When I deploy my app on any machine other then the dev machine, I get an exception thrown and it's message is "Could not load assembly System.Data.SQLite.dll or one of its dependencies. The specified module could not be found."
The System.Data.SQLite.dll reference in the project is set to Copy Local = True. Also, I tried manually loading the assembly with Assembly.LoadFile. The dll is placed in the output directory. I also tried setting the platform target to Any CPU as well as x86, no difference. All machines I am working with are 32-bit. What is the issue here? Why is my application trying to load the assembly and can't find it?
Thanks!
I had the same problem after publishing my program to a separate computer. Installing Microsoft Visual C++ 2010 Redistributable Package (x86) on the separate computer fixed the problem.
Note: the separate computer already had Microsoft Visual C++ 2010 Redistributable Package (x64) installed, the x86 version was needed.
'System.Data.SQLite.dll" requires "msvcr100.dll" which is one of it's Dependencies. This will be available only if you installed latest "Microsoft Visual C++ Redistributable" or any other product which internally provides this.
For example, VS2010 will install C++ Redistributable by default. Thats the reason your application doesnot works in some machine but works in others.
You could try pasting the "msvcr100.dll" in your application bin folder and distribute if you dont want to install VC++ 2010 Redist in all the PC's.
Some of the System.Data.Sqlite.dll modules depend on the "Microsoft Visual C++ 2012 Redistributable Package" .
You can find required dependencies on the official download page : http://system.data.sqlite.org/index.html/doc/trunk/www/downloads.wiki
The answers already given didn't solve my problem. I tried to deploy to a VMware server. The solution that did help where given here: http://sqlite.1065341.n5.nabble.com/System-Data-SQLite-Deployment-Mystery-td71752.html Two methods are described there.
When i install this sqlite-netFx45-setup-bundle-x86-2012-1.0.88.0.exe, my app is able to find the right dll.
The second method is to add the dll to de app.exe.config in the debug or release dir. If you edit this file directly, there is a change VC will overwrite the file.
My main problem was that i installed the sqlite package manually. I didn't use NuGet, because i'm behind a proxy. If you do use Nuget, the information in the app.exe.config will be provided automatically.
Using NuGet behind a proxy is described here: NuGet Behind Proxy
Related
I get this error when using SQLite.
DllNotFoundException: Unable to load DLL 'SQLite.Interop.dll': The
specified module could not be found. (Exception from HRESULT:
0x8007007E)
I tried several solution without success.
Tried using x86/x64
Tried this:
Visual Studio 2017 Xamarin UWP break, unable to load "sqlite3"
Added 2015 Visual C++ runtime dependency for UWP.
Tried manually adding the .dll and set it to "copy always".
Tried installing locally depedencies from here
I'm really out of ideas.
I had this problem running in release but not in debug.
I am using VS2017 15.9.5
Using Release manager I changed all the projects to use Release x64
Strangely the Platform tab asked me to make a new Platform and I had to do this in order to be able to pick an x64 platform
I wound up installing the SQLite modules in all the projects, not just the data tier. it would not work with just the data tier, even though I had Copy local true.
Here are the nuget packages I used
I have a small C# WinForms app developed using Visual Studio Community 2015 on Windows 8.1 on a 64-bit computer and targeting .Net Framework 4.5.2 and Any CPU | Prefer 32-bit. (I also tried targeting just x86).
I used NuGet Package Manager to install Entity Framework 6.3.1 and System.Data.SQLite 1.0.101 (which installed System.Data.SQLite, System.Data.SQLite.Core, System.Data.SQLite.EF6, and System.Data.SQLite.Linq), though System.Data.SQLite.Core doesn't show in the project references.
The app runs fine in the VS debugger, but the ClickOnce published version triggers an Unable to load SQLite.Interop.dll exception when installed and run on the same computer.
I don't see any references to SQLite.Interop.dll in Solution Explorer. There are such dlls in both the x86 and x64 Debug folders of the project, but not in the Release folder which is empty. When I try to add a reference to either the x86 or x64 dlls, I get an error saying they could not be added (i.e. inaccessible or not a valid assembly or COM component). All 3 of the SQLite dlls in the project references have Copy Local = true.
I'm guessing the SQLite NuGet install failed to set some project property/reference, but I don't know what that might be, why, and how to get around it. I'm not even sure who's responsible: SQLite, NuGet, Visual Studio, me?
Thanks for any help. Steve
I JUST found a working solution. Read the comment outlined https://github.com/oysteinkrog/SQLite.Net-PCL/issues/158#issuecomment-88163499 <- there
Important piece:
I created new PROJECT folders for x86 and x64. I created the project folders in the project that click-once deploys. That is, the project that produces the executable. I copied the interop files from the bin folder into the new solution folders
Just include x86 and x64 folders in your solition explorer. Then set Copy to local=true. I will create folders with sqlite.interop.dll
Had a similar issue, resolved it by simly creating the x64 and x86 folder on my startup project as follows:
I am using a separate class library project to communicate with the sqlite db. This is where I copied the sqlite.interop.dll files from
I am trying to publish my Web App in Visual Studio Professional 2013 but getting the following error
I got the same question asked over here but no useful answer.
Can anyone please help
You probably will be using older version, that was having an issue. refer detail [here]
Install the newer web deployment tool, should work.
which .net version are you using.
check web deploy version. if vs has 2 web deploy version, the vs get confuse to take which version. If it has 2 version, just uninstall vs and then instal it along with web deploy. if the Vs has one 1 web deploy version, you uninstall and install the web deploy. It will rectify your problem i hope.
You can refer This link
Check if version 9.0.0.0 of the assembly is installed in GAC. (from the VS2013 developer command prompt) gacutil /l Microsoft.Web.Deployment. Issues like this have occurred in the past where things worked, then after installing an update (or trying to install one) then reports of missing dlls, like nuget, occur.
The usual course of action is to repair the Visual Studio installation.
There is a problem with your publish profile. Delete the pubxml file located bellow Properties folder in your project and then create a new publish profile.
I got the same problem when older project runs into the new .NET Framework, for that you have to do the following.
Right Click on your project name->select Property Pages -> Click Build from the menu-> then select Target Framework .Net framework 4.5 or your current using framework..
"Could not load file or assembly" means the required file (of that mentioned version) is not available in the assembly (nor in the registry). All you gotta to do is to ensure this same is installed properly that would allow you to proceed further. The other things to ensure is the latest framework installed on your system.
Think you have some errors happen when to install or update Visual 2013, so you can reinstall again and this error will be fixed.
A project gets built fine from Visual Studio without a problem from developers work station. Now we need to more it to DEV and UAT server. I've been struggling all day trying to get my ASP.NET project built with msbuild on a server with no Visual Studio installed (dev tools not permitted on servers) -
The type or namespace name 'Optimization' does not exist in the namespace 'System.Web'
The type or namespace name 'DotNetOpenAuth' could not be found
Couple attempts were made:
1. Install Windows SDK (http://msdn.microsoft.com/en-US/windows/hardware/hh852363) - appears there has been a lot of discussions from another Stackoverflow post (Related but not exactly - Build ASP.NET 4.5 without Visual Studio on Build Server). You'd also need to add to environment variables PATH
C:\WINDOWS\Microsoft.NET\Framework64\v4.0.30319\
C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0A\bin\NETFX 4.0 Tools
(This did NOT help)
2: gacutil to install the dll's?
(no vs command prompt - as said, no dev tool/Visual Studio permitted on server)
3: copy the dlls' to (i.e. same folder as MSBuild.exe):
C:\WINDOWS\Microsoft.NET\Framework64\v4.0.30319\
(This did NOT help)
4: Copy local = true
(This did NOT help - the dll's apparent msbuild can't find already in bin folder of the ASP.NET application)
It appears to be a bug with msbuild - http://social.msdn.microsoft.com/Forums/vstudio/en-US/434abf1a-30db-4b13-8062-13755898dd71/msbuild-is-unable-to-link-to-a-webapplication-project?forum=msbuild
Anyone has experience with this?
Thank you for your feedback. This is an intentional change made in VS 2012. Projects excluded from a build configuration do not get built when you are building that configuration.
Yes, I've had experience with that. I discovered that excluding the project was handy in the IDE, I think I remember so that stable libraries don't get rebuilt so often; but the user could right-click on that project and build directly just once or when really needed.
But, it broke the MSBuild.exe command-line build, because those projects were not available at all.
One thing is to add conditional logic to the build file so it knows to set things differently for an interactive user or a pure build environment:
Condition="'$(BuildingInsideVisualStudio)' == 'true'"
I ended up eventually improving the build solution in my case, so I can't recall a specific example of the Excluded thing.
I am currently using SQLite for Windows Forms but while running the project it is showing the error:
Unable to load DLL 'sqlite3': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
I had added the DLL of System.Data.SQLite.dll but it is showing the same error. Please can any one help me by giving the perfect answer regarding this problem? Thanks in advance
This should fixed my issue.
Add the following DLLs.
Microsoft Visual C++ Runtime Package
SQLite for Windows Runtime
Use Project "Add Existing Item" and select the sqlite3.dll "As link". Click OK. Choose DLL in project and set "Copy Local" value to True.
Maybe you haven't added the version for the right platform? SQLite is distributed with one X86 (32 bit) assembly and one X64 (64 bit) assembly.
If your application is a 32 bit application you should use the System.Data.SQLite.dll located in the "bin" directory of the System.Data.SQLite distribution, if it is a 64 bit application you should use the one in "bin\x64".
However, from looking at the error message a second time I'm not sure if that's it. Are you making native calls to SQLite? In that case you may have to rename the dll to sqlite3.dll.
As you may know System.Data.SQLite is a bundling of the original native sqlite3.dll and a managed ADO.NET provider (unless you are using some old version in which case I'm not sure - you might need the native sqlite3.dll separately)
In my case I'm working on a UWP project. I had to add a reference to Visual C++ 2015 Runtime for Universal Windows Platform Apps and the error was gone. It can be added in the Reference Manager under Universal Windows > Extensions. Detailed solution can be found here.
After struggling for 3 days,finally found a way to resolve.
As of March 2018,if you try to use sqlite-net via Nuget Package Manager,it adds two files and few reference dlls to your solution independent of type of project UWP or Android etc.
And after that if you compile and run the solution will fail with an exception
Unable to load DLL 'sqlite3': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
This is because it is unable to load sqlite3.dll as it is not added to the solution via NUGET package manger.So you need to add it manually.
To add,first determine your project is 32 bit or 64 bit then download the respective Precompiled Binaries for Windows Runtime from https://www.sqlite.org/download.html and add them manually (copy and paste).
So now your solution will look like below one and it will run without issues.
I had the same issue when I downloaded the latest sqlite provider and I tried a solution from here but it didnt work, hence I downloaded the earlier version and its works fine.
Had this problem recently - after attaching procmon to my process, I found that the latest System.Data.SQLite libs (the ones built for .NET4) have a dependency on the MSVC 2010 runtime, and the servers didn't have this installed. Fortuantly, this can be pulled down from the Microsoft website.
I had exactly the same problem for the UWP project in a Xamarin.Forms application.
Adding reference to "SQLite for Universal Windows Platform" to the UWP project solved the problem.
Copy sqlite3.dll to the System32 folder. It worked for me. And thanks too!
I'm building a native Windows Phone 8.1 app with a PCL and a Droid project. I had the same error and I put the reference to the right version of sqlite3.dll (wpa81) and all worked.
Especially if you've updated to Visual Studio 2015 RTM and are developing Universal Windows apps, try uninstalling the SQLite for Universal App Platform extension and reinstalling (see http://sqlite.org/download.html).
All of these seem to be solutions for certain situations. For me, and for #Marlon Ticao on this page, the application just can't find the DLL.
There are 2 solutions. Copy it to a directory that is in you path (such as System32) or you can copy it into the same directory that your executable is.
I had this exact problem using a 3rd party built sqlite3.dll -- the app would not launch. I used the dependency walker to find that this sqlite3.dll had a dependency on msvcr110.dll. Once I included this file, all was well.
Don't forget to deploy the published runtimes folder too in .NET (Core) projects, it should contain that DLL for various targets.