Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on
GitHub to continue tracking issues. Bugzilla will remain
available for reference in read-only mode. We will continue to work
on open Bugzilla bugs, copy them to the new locations
as needed for follow-up, and add the new items under Related
Our sincere thanks to everyone who has contributed on this bug
tracker over the years. Thanks also for your understanding as we
make these adjustments and improvements for the future.
Please create a new report for Bug 31807 on
Developer Community or GitHub if you have new
information to add and do not yet see a matching new report.
If the latest results still closely match this report, you can use the
In special cases on GitHub you might also want the comments:
GitHub Markdown with public comments
I am copying the available information so far into a bug report for tracking.
> My app is crashing on a Galaxy Nexus (Android 4.3) when built for debug with
> the "Use Shared Runtime" option. Works without that option.
> Compile using Android version is "Use Latest Platform (API Level 21), min
> Android to target is "API Level 15", target Android version is "Use Compile
> using SDK version".
> 07-09 11:32:30.400 W/monodroid( 9918): Using override path: /data/data/au.com.obansolutions.mobile/files/.__override__
> 07-09 11:32:30.400 W/monodroid( 9918): Using override path: /storage/emulated/0/Android/data/au.com.obansolutions.mobile/files/.__override__
> 07-09 11:32:30.400 W/monodroid( 9918): Trying to load sgen from: /data/data/au.com.obansolutions.mobile/files/.__override__/libmonosgen-2.0.so
> 07-09 11:32:30.400 W/monodroid( 9918): Trying to load sgen from: /storage/emulated/0/Android/data/au.com.obansolutions.mobile/files/.__override__/libmonosgen-2.0.so
> 07-09 11:32:30.400 W/monodroid( 9918): Trying to load sgen from: /data/app-lib/au.com.obansolutions.mobile-1/libmonosgen-2.0.so
> 07-09 11:32:30.400 W/monodroid( 9918): Trying to load sgen from: /data/app-lib/au.com.obansolutions.mobile-1/libmonosgen-32bit-2.0.so
> 07-09 11:32:30.400 W/monodroid( 9918): Trying to load sgen from: /system/lib/libmonosgen-2.0.so
> 07-09 11:32:30.400 F/monodroid( 9918): cannot find libmonosgen-2.0.so in override_dir: /data/data/au.com.obansolutions.mobile/files/.__override__, app_libdir: /data/app-lib/au.com.obansolutions.mobile-1 nor in runtime_libdir as: /system/lib/libmonosgen-2.0.so
> 07-09 11:32:30.400 F/monodroid( 9918): Do you have a shared runtime build of your app with AndroidManifest.xml android:minSdkVersion < 10 while running on a 64-bit Android 5.0 target? This combination is not supported.
> 07-09 11:32:30.400 F/monodroid( 9918): Please either set android:minSdkVersion >= 10 or use a build without the shared runtime (like default Release configuration).
> 07-09 11:32:30.416 I/ActivityManager( 377): Process au.com.obansolutions.mobile (pid 9918) has died.
## Possible regression status: regression between Cycle 5 SR 1 and Cycle 5 SR 2
There is a chance this issue _might_ be resolved by some fixes that have been made for other Xamarin.Android bugs (for example Bug 31527 (where the Linker setting was involved) and non-public Bug 31575).
Until preliminary builds that include those fixes are available, if any users who are hitting this bug have a chance to add more information, that would be perfect.
## Additional information that would be helpful to add to this bug report for
anyone who can reproduce this issue
A. Can you reproduce the problem using a "new from template" Android app or Xamarin.Forms app? If not, then if anyone already has (or would be able to quickly create) a minimal test case that demonstrates the problem, please do attach it on this bug report. (See also the KB article link above for some tips about minimizing a test case.)
B. Have any users seen this error on any devices other than Galaxy Nexus, Android 4.3?
C. Does this problem only affect Visual Studio or Xamarin Studio? For example, if any users are hitting this issue in Visual Studio, are you also able to reproduce the problem using Xamarin Studio on Windows?
D. If you manually uninstall both the app and the shared runtime ("Mono Android... Support" and "Mono Shared Runtime") from the device (for example by using the device settings menu), and then re-install the app from the command line using `msbuild` (or `xbuild` on Mac), are the results different?
> msbuild /t:Install AndroidApp1.csproj
E. For thoroughness, you can also copy and paste your detailed version information  from either Visual Studio or Xamarin Studio directly in a comment or in a text file attachment.
>  https://kb.xamarin.com/customer/portal/articles/1675684-where-can-i-find-my-version-information-and-logs-
For comparison, when running a "new from template" Android app successfully on an LG Optimus L9, Android 4.1.2 device, the adb logcat log file shows one additional location that is searched for the `libmonosgen-2.0.so` file:
> Trying to load sgen from: /data/data/AndroidApp1/files/.__override__/links/libmonosgen-2.0.so
It seems Xamarin.Android is for some reason skipping this location in the original user report in comment 0?
There is a bit of a suspicious coincidence that the fix for Bug 29130 was released in C5SR2. As I understand it, that fix _added_ some logic to use the `links` directory, so I'm surprised it would somehow cause the `links` directory to get skipped (assuming this is indeed a regression between Cycle 5 SR1 and Cycle 5 SR2).
Brendan, do you know if it happens also when you rebuild the app completely (clean and then build and deploy). It either means we are unable to create successfully link to 32bit libmonosgen or that the apk has old libmonodroid.
Peter, do you have Galaxy Nexus with 4.3 around? Could you try to reproduce it?
I upgraded one of our Galaxy Nexus devices to 4.3 and was unable to reproduce this when deploying from VS and XS on Win/Mac.
Looks like the clean target isn't removing everything. Manually removed the obj and bin folders, the app now works.
Directory of C:\OBTFS\Mobile2\Mobile\Oban.Mobile\Oban.Mobile.Android\obj\Debug
21/07/2015 03:29 PM <DIR> .
21/07/2015 03:29 PM <DIR> ..
21/07/2015 03:23 PM 922,332 DesignTimeResolveAssemblyReferences.cache
21/07/2015 03:22 PM 13,334 DesignTimeResolveAssemblyReferencesInput.
21/07/2015 03:22 PM 0 TemporaryGeneratedFile_036C0B5B-1481-4323
21/07/2015 03:22 PM 0 TemporaryGeneratedFile_5937a670-0e60-4077
21/07/2015 03:22 PM 0 TemporaryGeneratedFile_E7A71F73-0F8D-4B9B
21/07/2015 03:21 PM <DIR> TempPE
5 File(s) 935,666 bytes
I'm suddenly getting hit by this. It's occurring on my Samsung Galaxy Tab (Android 5.0.2) but NOT genymotion on the latest stable.
Dean, could you please look at the Clean target?
The DesignTimeResolveAssemblyReferences.cache, DesignTimeResolveAssemblyReferencesInput.cache, and the TemporaryGeneratedFile* are actually generated by Visual Studio itself not by our build system. Generally we only automatically delete files we have generated. I'm not sure why VS is leaving those around.
@Dean, so could we improve our Clean target maybe? Or Input, Outputs dependencies? It looks to me as a msbuild issue, where we are generating apk with an old libmonodroid.so from previous installation?
Simon, jkolb, could you please attach a sample project, so that we can reproduce it locally?
I can't reproduce it locally myself any more - the initial build needs to be with an older version of Xamarin.
Missed freeze for C5SR4. Discussed with JonP - this won't be addressed before C6SR1.
This error popped up again. Is there any further info?
I'm working with the following versions:
Xamarin Studio Enterprise
Version 6.1.4 (build 1)
Installation UUID: db69cadc-fa38-476f-b824-a409bed0d8e3
Mono 4.6.2 (mono-4.6.0-branch/ac9e222) (64-bit)
GTK+ 2.24.23 (Raleigh theme)
Package version: 406020016
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler
Apple Developer Tools
Xcode 8.2.1 (11766.1)
Version: 10.3.1.8 (Visual Studio Enterprise Trial)
Build date: 2016-12-20 02:58:14-0500
Version: 220.127.116.11 (Visual Studio Enterprise Trial)
Version: 18.104.22.168 (Visual Studio Enterprise Trial)
Android SDK: /Users/Jonah/Library/Developer/Xamarin/android-sdk-macosx
Supported Android versions:
6.0 (API level 23)
7.0 (API level 24)
SDK Tools Version: 25.2.5
SDK Platform Tools Version: 25.0.3
SDK Build Tools Version: 25.0.2
Java SDK: /usr
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)
Android Designer EPL code available here:
Xamarin Android Player
Build date: 11/15/2016 10:13:59 PM
Release ID: 601040001
Git revision: e606823f2dd01b4552216c013b597a73bec2068f
Build date: 2017-01-10 17:28:57-05
Xamarin addins: c92d0626d347aaa02839689eaac2961d24c9f446
Build lane: monodevelop-lion-cycle8
Mac OS X 10.12.2
Darwin Jonahs-MBP.rug.adroot 16.3.0 Darwin Kernel Version 16.3.0
Thu Nov 17 20:23:58 PST 2016
Enabled user installed addins
Addin Maker 1.3.2
Redth's Addins 1.0.2
Xamarin Inspector 22.214.171.124
I just ran into this issue as well using the latest Visual Studio for Mac, latest Xamarin Android, and latest Android SDK components. It occurred when I changed my target to Android 8.0. Clean / rebuild / deploy didn't work. Manually uninstalling the Mono Shared Runtime and my app, then redeploying fixed it.