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 on
Developer Community or GitHub with
your current version information, steps to reproduce, and relevant error
messages or log files if you are hitting an issue that looks similar to
this resolved bug and you do not yet see a matching new report.
Created attachment 22559 [details]
My project has been compiling without error in 'Debug > iPhone', but when we attempted to compile in 'Release > iPhone' mode- compilation fails with the following error:
> /Users/dfoulk/Projects/OSCC-FF/OSCC-FF/OSCC-FF.iOS/MTOUCH: Error MT2001: Could not link assemblies. (MT2001) (OSCC_FF.iOS)
Please see attached for the trace log.
To recreate the issue:
1) Create a new Xamarin Forms project in Visual Studio
2) Update Xamarin.Forms to v18.104.22.168-pre1
3) Ensure that App.xaml.cs has this just before the namespace declaration: "[assembly: XamlCompilation(XamlCompilationOptions.Compile)]" (and remove any other instances of this line from other pages if applicable)
4) It may be necessary to enable (check) the 'iOS IPA Options > Build iTunes Package Archive (IPA)' option in the iOS project
Note: We are using a "Distribution" Signing Identity & an Enterprise Provisioning Profile (not sure if this affects the outcome).
We expected the app to compile without error, but it compiled with the above error.
(Build 2017-05-30 on macOS Sierra v10.12.5)
Our workaround: We had to remove the "[assembly: XamlCompilation(XamlCompilationOptions.Compile)]" line from our App.xaml.cs file to build our iOS app. This is not what we want to do as this negatively impacts the performance of our application!
*** This bug has been marked as a duplicate of bug 56281 ***
It seems as though my issue may be different than bug 56281. Yes, the error is the same, but evidently it is a very generic error and can be caused by many things.
Also, the bug that I was supposedly duplicating was also marked as a duplicate and was supposed to be fixed as of v22.214.171.124.
I am using Xamarin.Forms v126.96.36.199-pre1. That being said, my project was originally created with Xamarin.Forms v188.8.131.52.
Finally, this project was building just fine until 5/30. I'm not sure if I did any updates that day... Here is my current environment:
Microsoft Visual Studio Professional 2017
Version 15.2 (26430.6) Release
Microsoft .NET Framework
Installed Version: Professional
Visual Basic 2017 00370-20004-74785-AA463
Microsoft Visual Basic 2017
Visual C# 2017 00370-20004-74785-AA463
Microsoft Visual C# 2017
Visual C++ 2017 00370-20004-74785-AA463
Microsoft Visual C++ 2017
Visual F# 4.1 00370-20004-74785-AA463
Microsoft Visual F# 4.1
Application Insights Tools for Visual Studio Package 8.6.00404.2
Application Insights Tools for Visual Studio
ASP.NET and Web Tools 2017 15.0.30503.0
ASP.NET and Web Tools 2017
ASP.NET Web Frameworks and Tools 2017 5.2.50303.0
For additional information, visit https://www.asp.net/
Azure App Service Tools v3.0.0 15.0.30209.0
Azure App Service Tools v3.0.0
Azure Data Lake Node 1.0
This package contains the Data Lake integration nodes for Server Explorer.
Azure Data Lake Tools for Visual Studio 2.2.5000.0
Microsoft Azure Data Lake Tools for Visual Studio
Common Azure Tools 1.9
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.
Visual Studio extension that integrates GitFlow
A Visual Studio Extension that brings the GitHub Flow into Visual Studio.
JetBrains ReSharper Ultimate 2017.1.2 Build 108.0.20170428.75743
JetBrains ReSharper Ultimate package for Microsoft Visual Studio. For more information about ReSharper Ultimate, visit http://www.jetbrains.com/resharper. Copyright © 2017 JetBrains, Inc.
KofePackagePackage Extension 1.0
KofePackagePackage Visual Studio Extension Detailed Info
Merq 1.1.17-rc (cba4571)
Command Bus, Event Stream and Async Manager for Visual Studio extensions.
Microsoft Azure Hive Query Language Service 2.2.5000.0
Language service for Hive query
Microsoft Azure Tools 2.9
Microsoft Azure Tools for Microsoft Visual Studio 2017 - v2.9.50131.1
Microsoft MI-Based Debugger 1.0
Provides support for connecting Visual Studio to MI compatible debuggers
Microsoft Visual Studio VC Package 1.0
Microsoft Visual Studio VC Package
Mono Debugging for Visual Studio Mono.Debugging.VisualStudio
Support for debugging Mono processes with Visual Studio.
NuGet Package Manager 4.2.0
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.
SQL Server Data Tools 15.1.61702.140
Microsoft SQL Server Data Tools
Hosting json editor into a tool window
TypeScript tools for Visual Studio
Visual Studio Tools for Universal Windows Apps 15.0.26430.06
The Visual Studio Tools for Universal Windows apps allow you to build a single universal app experience that can reach every device running Windows 10: phone, tablet, PC, and more. It includes the Microsoft Windows 10 Software Development Kit.
Xamarin 184.108.40.2063 (c871575)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android SDK 220.127.116.11 (448f54f)
Xamarin.Android Reference Assemblies and MSBuild support.
Xamarin.iOS and Xamarin.Mac SDK 10.10.0.30 (30b6e87)
Xamarin.iOS and Xamarin.Mac Reference Assemblies and MSBuild support.
I was unable to reproduce this issue using the latest preview 18.104.22.168-pre3 running the latest Xamarin.Visual Studio 22.214.171.1246
If this is still occuring for you, please provide a full test sample which reproduces the issue.
Hi Cody, I don't use prerelease packages in my projects... It's just bit me in the rear before (using unstable packages). I guess I'll just wait for a stable release of 2.3.5. Thanks
*** Bug 57530 has been marked as a duplicate of this bug. ***