Referenced native libraries getting pre-compiled and then throwing exception

Hi I have an issue in the universal app. I am referencing Nokia.Graphics.Imaging.dll and WindowsPreview.Media.Ocr.dll in the universal app project. Everything compiles and runs on every device I tested it with. The problem is that after some time NGen kicks
in and pre-compiles my DLLs, including the native ones. These DLLs then get corrupt and next time I run the app I get BadImageFormatException due to an attempt to load the <nativelibrary>.ni.dll. Is this a bug of NGen? When I delete these <nativelibrary>.ni.dll
files the app runs again.

Hi, unfortunately, I was not able to simulate this behavior in another project so far. Here
http://uloz.to/xRShw487/precompiled-zip are NGENed files from our application (_not_working folder) and from a filter-manager sample (_working from different_app). As you can see for some reason Lumia.Imaging.ni.dll
in our app has only 796kB, while from the other app it has 1235kB.
The NGEN log file looks ok to me:
03/23/2015 15:18:24.272 [11796]: 1>    Compiling assembly C:\Program Files\WindowsApps\app\Lumia.Imaging.Managed.DLL (CLR v4.0.30319) ...
03/23/2015 15:18:24.350 [11796]: ngen returning 0x00000000
03/23/2015 15:18:25.334 [24168]: 1>    Compiling assembly C:\Program Files\WindowsApps\app\WindowsPreview.Media.Ocr.winmd (CLR v4.0.30319) ...
03/23/2015 15:18:25.365 [24168]: ngen returning 0x00000000
03/23/2015 15:18:25.444 [8036]: 1>    Compiling assembly C:\Program Files\WindowsApps\app\Lumia.Imaging.winmd (CLR v4.0.30319) ...
03/23/2015 15:18:25.725 [8036]: ngen returning 0x00000000
Once I delete Lumia.Imaging.ni.dll and WindowsPreview.Media.Ocr.ni.dll, the app starts working again. Lumia.Imaging.Managed.DLL seems to be OK and does not cause any troubles, maybe because it is managed, while both of the problematic DLLs are native already.
Hi LVolf,
>>I am referencing Nokia.Graphics.Imaging.dll and WindowsPreview.Media.Ocr.dll in the universal app project
How did you add these references in your project? Basically, the NuGet package is the easiest way, for example:
See the
NuGet documentation for all the ways you can download and install the NuGet package in your project. To install the package from within Microsoft Visual Studio, do the following:
1.In Visual Studio, select PROJECT | Manage NuGet Packages.
2.In the Online section, select nuget.org. Search for
Microsoft.Windows.Ocr.
3.Click Install.
4.Select BUILD | Configuration Manager to change the build configuration of your project from
AnyCPU to x86, x64, or ARM.
5.If Intellisense does not work after you have installed the NuGet package, unload and reload the Visual Studio project. In Solution Explorer, right-click the project and select
Unload Project. Then right-click the project again and select
Reload Project.
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