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1) Delete the 'obj' and 'bin' directories from your project.
2) Alter a '.xaml' file
3) The task fails with this error:
Fix: Add a mkdir to the forms '.targets' file so the output directory is created before xamlg itself is invoked.
I have checked this issue and I am able to reproduce this issue.
Steps I followed:
1. Create a Blank App ( Xamarin.Forms Portable)
2. Delete the "obj" and "bin" file of newly created project
3. Add new Forms ContentPage Xaml page.
When I add a xml page to the portable project I observed that I am getting following error:
"Error: Unknown MSBuild failure. Please try building the project again".
I am getting same error with both project "Blank App (Xamarin.Forms Portable)" and "Blank App ( Xamarin.Forms Shared)"
Build output: https://gist.github.com/saurabh360/e7fcbdd7f07580e1b6ae
Tool output: https://gist.github.com/saurabh360/561f2de01b4fbe962347
=== Xamarin Studio ===
Version 5.6.1 (build 5)
Installation UUID: 6ea47b0d-1852-4aaf-808d-373ff0a5002b
Mono 3.10.0 ((detached/633e444)
GTK+ 2.24.23 (Raleigh theme)
Package version: 310000020
=== Apple Developer Tools ===
Xcode 6.0.1 (6528)
=== Xamarin.Mac ===
Version: 220.127.116.11 (Business Edition)
=== Xamarin.Android ===
Version: 4.18.0 (Business 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: 18.104.22.168 (Business Edition)
Build date: 2014-10-12 21:49:14-0400
=== Build Information ===
Release ID: 506010005
Git revision: 4a603dc77610b9eff2a41582146c56b69a81ceba
Build date: 2014-10-09 11:07:06-04
=== Operating System ===
Mac OS X 10.9.5