[kreativasas]

HI,
i have a very big problem.

I released a program usign assimp (the latest version). compiling the program i need to use only x64 CPU.
In my bin folder I copied assimp64.dll and add a reference for assimpnet.dll
On my pc everything works as well, but whei i install the program on my customer pc i get an error:

It seems the program could not load assimp64.dll but the file exists on bin folder!!

SOMEBODY CAN HELP ME??

  Assimp.AssimpException: Error loading unmanaged library from path: Assimp64.dll, see inner exception for details.
Impossibile trovare il modulo specificato. (Eccezione da HRESULT: 0x8007007E) ---> System.IO.FileNotFoundException: Impossibile trovare il modulo specificato. (Eccezione da HRESULT: 0x8007007E)
   --- Fine della traccia dello stack dell'eccezione interna ---
   in Assimp.Unmanaged.AssimpLibraryWindowsImplementation.NativeLoadLibrary(String path)
   in Assimp.Unmanaged.AssimpLibraryImplementation.LoadAssimpLibrary(String path)
   in Assimp.Unmanaged.AssimpLibrary.LoadLibrary()
   in Assimp.Unmanaged.AssimpLibrary.IsExtensionSupported(String extension)
   in Ab3d.Assimp.AssimpWpfImporter.ReadFileToAssimpScene(String fileName)
   in Ab3d.Assimp.AssimpWpfImporter.ReadModel3D(String fileName, String texturesPath)
   in smart3dalign.Form1.Form1_Shown(Object sender, EventArgs e)
   in System.Windows.Forms.Form.OnLoad(EventArgs e)
   in System.Windows.Forms.Form.OnCreateControl()
   in System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   in System.Windows.Forms.Control.CreateControl()
   in System.Windows.Forms.Control.WmShowWindow(Message& m)
   in System.Windows.Forms.Control.WndProc(Message& m)
   in System.Windows.Forms.Form.WmShowWindow(Message& m)
   in System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

[GraPhiX]

HI,
i have a very big problem.

I released a program usign assimp (the latest version). compiling the program i need to use only x64 CPU.
In my bin folder I copied assimp64.dll and add a reference for assimpnet.dll
On my pc everything works as well, but whei i install the program on my customer pc i get an error:

It seems the program could not load assimp64.dll but the file exists on bin folder!!

SOMEBODY CAN HELP ME??

  Assimp.AssimpException: Error loading unmanaged library from path: Assimp64.dll, see inner exception for details.
Impossibile trovare il modulo specificato. (Eccezione da HRESULT: 0x8007007E) ---> System.IO.FileNotFoundException: Impossibile trovare il modulo specificato. (Eccezione da HRESULT: 0x8007007E)
   --- Fine della traccia dello stack dell'eccezione interna ---
   in Assimp.Unmanaged.AssimpLibraryWindowsImplementation.NativeLoadLibrary(String path)
   in Assimp.Unmanaged.AssimpLibraryImplementation.LoadAssimpLibrary(String path)
   in Assimp.Unmanaged.AssimpLibrary.LoadLibrary()
   in Assimp.Unmanaged.AssimpLibrary.IsExtensionSupported(String extension)
   in Ab3d.Assimp.AssimpWpfImporter.ReadFileToAssimpScene(String fileName)
   in Ab3d.Assimp.AssimpWpfImporter.ReadModel3D(String fileName, String texturesPath)
   in smart3dalign.Form1.Form1_Shown(Object sender, EventArgs e)
   in System.Windows.Forms.Form.OnLoad(EventArgs e)
   in System.Windows.Forms.Form.OnCreateControl()
   in System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   in System.Windows.Forms.Control.CreateControl()
   in System.Windows.Forms.Control.WmShowWindow(Message& m)
   in System.Windows.Forms.Control.WndProc(Message& m)
   in System.Windows.Forms.Form.WmShowWindow(Message& m)
   in System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Hello, not sure if this will help i also use VB.NET and created a Loader class this may help you, i also included Assimp32.dll even though it is 64bit

Code:

#Region "Assimp Loader Class"
    Public Class AssimpLoader

        Public Shared Sub LoadAssimpNativeLibrary()
            Dim assimpLibraryFolder As String = AppDomain.CurrentDomain.BaseDirectory
            LoadAssimpNativeLibrary(assimpLibraryFolder, assimpLibraryFolder)
        End Sub
        Public Shared Sub LoadAssimpNativeLibrary(ByVal assimpLibraryFolder As String)
            LoadAssimpNativeLibrary(assimpLibraryFolder, assimpLibraryFolder)
        End Sub

        Public Shared Sub LoadAssimpNativeLibrary(ByVal assimp32BitLibraryFolder As String, ByVal assimp64BitLibraryFolder As String)
            Try
                AssimpWpfImporter.LoadAssimpNativeLibrary(assimp32BitLibraryFolder, assimp64BitLibraryFolder)
            Catch ex As AssimpException
                MessageBox.Show("Error loading native assimp library! The most common cause of this error is that the Visual C++ Redistributable for Visual Studio 2019 is not installed on the system. Please install it manually or contact support of the application. Error message:" & ex.Message)
                Throw
            End Try
        End Sub



    End Class
#End Region

The other thing i forgot to mention is in your solution explorer show all items right click on assimp64.dll and choose include in project then right click on assimp64.dll choose properties Build Action = Content
and also
Copy to Output Directory = Copy if newer

[abenedik]

I see that there is a FileNotFoundException. It would be good if we can see the value of the FileNotFoundException.FileName property.

If this would show assimp64.dll then assimp loader cannot find the assimp64.dll file.
You can explicitly set the location of the file by calling AssimpWpfImporter.LoadAssimpNativeLibrary (see comments in the AssimpLoader.cs file for more info (in the Ab3d.PowerToys.Sample project).

But it is also possible that the missing file is part of the Visual C++Redistributable for Visual Studio 2019 that is required for the native assimp library. See the comments in the AssimpLoader.cs file for details on how to distribute that redistributable to your client computer (you can also check the internet for more info on that).

[kreativasas]

Ok guys, solved

Was the c++ redist missing.

Thanks!