Could not load assembly System.Data.SQLite.dll

Question

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!

Answer 1

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.

Answer 2

'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.