How to solve unable to load DLL 'drivelibrary.dll': the specified module could not be found. (Exception from HRESULT: 0x8007007e)

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C#

[DllImport("DriveLibrary.dll",  CallingConvention = CallingConvention.Cdecl, EntryPoint = "createClass")]


public static extern void createClass();
public void _createClass()
{
    try
    {
         createClass();
          debug("_createClass");
    }
    catch (Exception e)
    {
        Console.WriteLine(e.Message);
    }
}

What I have tried:

I try my best to Solve this error But I Cant. Please Anyone can Help Me???

Posted 19-Apr-16 1:19am

Member 10958630

Updated 19-Apr-16 1:31am

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Comments

Garth J Lancaster 19-Apr-16 7:25am

how did you try to solve it ? where is 'DriveLibrary.dll' in relation to the exe ?

Member 10958630 19-Apr-16 8:50am

DriveLibrary.dll is in the Debug folder

Member 10958630 20-Apr-16 0:19am

yes dll is in the debug folder

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Jochen Arndt · Answer 1 · 2016-04-19T01:31:00

Solution 1

The error message is quite clear:
The DLL file could not be found in one of the directories that are searched (see Dynamic-Link Library Search Order (Windows)[^]).

So copy the file to one of these directories or specify the full name with path.

[EDIT]
The error may be also thrown when dependencies can not be found (the DLL requires loading other DLLs). You may use the Dependency Walker (depends.exe) Home Page[^] to check this.
[/EDIT]

Posted 19-Apr-16 1:31am

Jochen Arndt

Updated 19-Apr-16 1:53am

v2

Comments

Member 10958630 19-Apr-16 7:34am

tried but not working

Jochen Arndt 19-Apr-16 7:51am

The DLL itself may have dependencies (requires to load other DLLs). If such a DLL can't be found, the error will be also thrown.

You might use the Dependency Walker (http://www.dependencywalker.com/) to check the dependencies. I will update my solution.

Member 10958630 19-Apr-16 8:51am

Tried Dependencywalker but Not working

Jochen Arndt 19-Apr-16 8:59am

What did you tried?

Load your application or the DLL with the Dependency Walker and check if all dependencies can be resolved.

Member 10958630 19-Apr-16 9:08am

Warning: At least one module has an unresolved import due to a missing export function in a delay-load dependent module.

Dependency Walker Error

Jochen Arndt 19-Apr-16 9:23am

That warning may be ignored in some cases. Check if there are missing modules (not found errors).

If you are really sure that the DLL itself can be loaded, you have to ask the author of the DLL for help.