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Tested this on Windows but the behaviour should be the same on Mac.
1) In Xamarin Studio create a new solution - Blank App (Xamarin.Forms Portable).
2) Make sure your project's target framework is above 3.2. By default it will be the latest Android project target framework which should be version 4 or above anyway.
3) Right click the solution and select Update Packages.
4) Compile the solution.
The compilation fails with the error:
C:\Program Files (x86)\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2,2): Error: Exception while loading assemblies: System.IO.FileNotFoundException: Could not load assembly 'Xamarin.Android.Support.v13, Version=220.127.116.11, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist in the Mono for Android profile?
File name: 'Xamarin.Android.Support.v13.dll'
at Xamarin.Android.Tuner.DirectoryAssemblyResolver.Resolve(AssemblyNameReference reference, ReaderParameters parameters)
at Xamarin.Android.Tasks.ResolveAssemblies.AddAssemblyReferences(ICollection`1 assemblies, AssemblyDefinition assembly, Boolean topLevel)
at Xamarin.Android.Tasks.ResolveAssemblies.Execute() (wwefwfwe.Android)
Looking at the Android project the Xamarin.Android.Support.v13 has not been installed when the v4 package was updated. The new Xamarin.Android.Support.v4 NuGet package has the v13 package as a dependency for Android projects with a target framework of 3.2 or above.
Trying the same thing in Visual Studio (by running Update-Package in the package manager console) and Visual Studio correctly installs the v13 package on updating. Compiling the solution after the update also works.
I have checked this issue and with the help of steps mentioned in bug description I am able to reproduce this issue.
When I update the package of solution, packages updated successfully but when I try to build the project XS shows following error:
"Error: Exception while loading assemblies: System.IO.FileNotFoundException: Could not load assembly 'Xamarin.Android.Support.v13, Version=18.104.22.168, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist in the Mono for Android profile?"
I have also observed that when I try to update the package by "Right click on Package directory under android project" I am not getting any error and application is working fine.
Note: I am getting same behavior on Mac and windows but the same is working fine on windows for VS.
Error Details: https://gist.github.com/saurabh360/66a0b9629323b32a63e7
Build Output: https://gist.github.com/saurabh360/7eedbc60f6701199012d
=== Xamarin Studio ===
Version 5.5.3 (build 6)
Installation UUID: 6ea47b0d-1852-4aaf-808d-373ff0a5002b
Mono 3.10.0 ((detached/e204655)
GTK+ 2.24.23 (Raleigh theme)
Package version: 310000023
=== Apple Developer Tools ===
Xcode 6.0.1 (6528)
=== Xamarin.Mac ===
Version: 22.214.171.124 (Trial Edition)
=== Xamarin.Android ===
Version: 4.18.0 (Trial Edition)
Android SDK: /Users/jatin66/Desktop/Backup/android-sdk-macosx
Supported Android versions:
1.6 (API level 4)
2.1 (API level 7)
2.2 (API level 8)
2.3 (API level 10)
3.0 (API level 11)
3.1 (API level 12)
3.2 (API level 13)
4.0 (API level 14)
4.0.3 (API level 15)
4.1 (API level 16)
4.2 (API level 17)
4.3 (API level 18)
4.4 (API level 19)
Java SDK: /usr
java version "1.7.0_65"
Java(TM) SE Runtime Environment (build 1.7.0_65-b17)
Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode)
=== Xamarin.iOS ===
Version: 126.96.36.199 (Trial Edition)
Build date: 2014-10-20 21:48:06-0400
=== Build Information ===
Release ID: 505030006
Git revision: fbe3e9453daf6a3bb9a9709ed22bec35f7c9056b
Build date: 2014-10-23 13:08:38-04
Xamarin addins: e44add2b39de4dd57c0742bb2e620dfad84c64c6
=== Operating System ===
Mac OS X 10.10.0
Darwin Jatin66s-iMac.local 14.0.0 Darwin Kernel Version 14.0.0
Fri Sep 19 00:26:44 PDT 2014
Should be fixed in:
Xamarin Studio: 188.8.131.526 (master)
I have checked this issue with builds below
Mac OS X 10.9.4
Xamarin Studio : 5.7 (build 596)
Mono 3.12.0 ((detached/b75fa2b)
GTK+ 2.24.23 (Raleigh theme)
Xcode 6.1 (6602)
Xamarin.iOS : 184.108.40.206 (Enterprise Edition)
Now this error does not occur and I am getting different error. So I have filled a different bug for this i.e bug https://bugzilla.xamarin.com/show_bug.cgi?id=24840
And I am closing this issue.