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Created attachment 7265 [details]
I’m having trouble loading the GeoAPI.Bootstrapper.NetTopologySuite.dll in my Xamarin Android project. It’s a PCL but when I run through the debugger Mono simply exits. Sometimes it has an error message about loading the DLL and sometimes not. If I remove the DLL from the project it works fine
I can’t find any incorrect settings in the PCL so I think it may be a bug in Xamarin? Regardless I’m hoping that whatever the case is that there’s a better error message for this case.
I still can't get around this.
I have run the attached project in VS and getting same behavior i.e. with dll GeoAPI.Bootstrapper.NetTopologySuite application exists with error "The program 'Mono' has exited with code 0 (0x0).". However when we remove this dll then it works fine as shown in screencast : http://screencast.com/t/YPaz1Rx9yAq
Error Log : https://gist.github.com/saurabh360/07c54f10c81e11b2b6f6
Environment info :
Microsoft Visual Studio Professional 2012
Version 11.0.61030.00 Update 4
Microsoft .NET Framework
Installed Version: Professional
Xamarin 220.127.116.11 (f2fbf971100745e8ad580d08c69ef29aa4d566ff)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android
Is there any way to debug this?
08-03 19:31:23.676 D/Mono ( 1340): Assembly Loader probing location: 'GeoAPI.Bootstrapper.NetTopologySuite'.
In mgmain JNI_OnLoad
08-03 19:31:23.676 F/monodroid-assembly( 1340): Coult not load assembly 'GeoAPI.Bootstrapper.NetTopologySuite' during startup registration.
08-03 19:31:23.676 F/monodroid-assembly( 1340): This might be due to an invalid debug instalation.
08-03 19:31:23.676 F/monodroid-assembly( 1340): A common cause is to 'adb install' the app directly instead of doing from the IDE.
The program 'Mono' has exited with code 0 (0x0).
This sample fails to build on OS X...due to case sensitivity issues:
> error : Exception while loading assemblies: System.IO.FileNotFoundException: Could not load assembly 'GeoAPI.BootStrapper.NetTopologySuite, Version=18.104.22.168, Culture=neutral, PublicKeyToken=f580a05016ebada1'. Perhaps it doesn't exist in the Mono for Android profile?
> File name: 'GeoAPI.BootStrapper.NetTopologySuite.dll'
> at Xamarin.Android.Tuner.DirectoryAssemblyResolver.Resolve (Mono.Cecil.AssemblyNameReference reference, Mono.Cecil.ReaderParameters parameters) [0x00000] in <filename unknown>:0
> at Xamarin.Android.Tuner.DirectoryAssemblyResolver.Resolve (Mono.Cecil.AssemblyNameReference reference) [0x00000] in <filename unknown>:0
> at Xamarin.Android.Tasks.ResolveAssemblies.AddAssemblyReferences (ICollection`1 assemblies, Mono.Cecil.AssemblyDefinition assembly, Boolean topLevel) [0x00000] in <filename unknown>:0
> at Xamarin.Android.Tasks.ResolveAssemblies.Execute () [0x00000] in <filename unknown>:0
The reason is that GeoAPI.BootStrapper.NetTopologySuite.dll doesn't exist; instead, it's GeoAPI.Bootstrapper.NetTopologySuite.dll (note case difference in 'Boot[Ss]trapper').
Renaming GeoAPI.Bootstrapper.NetTopologySuite.dll to GeoAPI.BootStrapper.NetTopologySuite.dll allows it to compile on OS X.
Once built and installed, it likewise fails for me as it does in Comment #3:
> F/monodroid-assembly(22163): Coult not load assembly 'GeoAPI.Bootstrapper.NetTopologySuite' during startup registration.
but also note the case difference: it's trying to load GeoAPI.Bootstrapper.NetTopologySuite.dll, yet what's actually installed?
> $ adb shell ls -l /storage/sdcard0/Android/data/NtsPclTest.NtsPclTest/files/.__override__
> -rw-rw---- u0_a575 sdcard_r 5632 2014-08-12 11:54 GeoAPI.BootStrapper.NetTopologySuite.dll
> -rw-rw---- u0_a575 sdcard_r 58368 2014-08-12 11:54 GeoAPI.dll
> -rw-rw---- u0_a575 sdcard_r 28160 2014-08-12 11:54 NetTopologySuite.IO.SpatiaLite.dll
> -rw-rw---- u0_a575 sdcard_r 564736 2014-08-12 11:54 NetTopologySuite.dll
> -rw-rw---- u0_a575 sdcard_r 5632 2014-08-12 11:54 NtsPclTest.dll
> -rw-rw---- u0_a575 sdcard_r 1299 2014-08-12 11:54 NtsPclTest.dll.mdb
> -rw-rw---- u0_a575 sdcard_r 187392 2014-08-12 11:54 PowerCollections.dll
> -rw-rw---- u0_a575 sdcard_r 90112 2014-08-12 11:54 ProjNET.dll
What's actually installed is GeoAPI.BootStrapper.NetTopologySuite.dll (because that's what I needed in order to compile).
What we have is a casing mismatch.
The fix is to edit NtsPclTest.csproj and change *all* references of GeoAPI.Bootstrapper.NetTopologySuite to GeoAPI.BootStrapper.NetTopologySuite:
> $ diff -u NtsPclTest.csproj.old NtsPclTest.csproj
> --- NtsPclTest.csproj.old 2014-08-12 12:21:14.000000000 -0400
> +++ NtsPclTest.csproj 2014-08-12 12:21:21.000000000 -0400
> @@ -43,8 +43,8 @@
> <Reference Include="GeoAPI">
> - <Reference Include="GeoAPI.Bootstrapper.NetTopologySuite">
> - <HintPath>..\packages\NetTopologySuite.1.13.3\lib\portable-net403+sl5+win8+wp8\GeoAPI.Bootstrapper.NetTopologySuite.dll</HintPath>
> + <Reference Include="GeoAPI.BootStrapper.NetTopologySuite">
> + <HintPath>..\packages\NetTopologySuite.1.13.3\lib\portable-net403+sl5+win8+wp8\GeoAPI.BootStrapper.NetTopologySuite.dll</HintPath>
> <Reference Include="Mono.Android" />
> <Reference Include="mscorlib" />
Nuke the bin and obj directories, rebuild+reinstall, and the app Works For Me™.
TL;DR: Android is a case-sensitive platform. You must make sure that all assembly references are consistent with regards to casing.
Ahhhh Thanks! You're right, that did it. I should have caught that.