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How to start? Value cannot be null error?

Hello.  I've downloaded your Xamarin.Forms sample project and I've loaded it into visual studio 2013 and connected to my Xamarin build server on my mac.  I'm unable to cleanly build the application (using the CircularGaugeSample.IOS as the default project).  I continually get an error that states 

Error 1 Value cannot be null.
Parameter name: project 0 0

I'm wondering if this is associated to the fact that I've received a registration code, but Ive not been prompted to register any of your components in your sample.  Am I missing something?  I don't see any readme files contained in the sample.

I've attached an image with the compile error. 


Attachment: Problem_f3cd3484.rar

5 Replies

NM Nijamudeen Mohamed Sulaiman Syncfusion Team April 30, 2015 01:15 PM UTC

Hi Lyndon,

Thanks for your interest in Syncfusion products.

We are working on your reported issue. It will be helpful, if you can provide more details regarding your Visual studio version such as enterprise/ultimate and Operating System version for both MAC and Windows? So that we can analyze more on it and update you the possible details.

Please let us know if you have any queries.

Nijamudeen M.

LH Lyndon Hughey April 30, 2015 02:09 PM UTC

Sure, my specs are listed below:

Windows 8.1 Running in Parallels 10.2.0 on a Mid2014 MBP (Mavericks 10.10.3)

Microsoft Visual Studio Professional 2013
Version 12.0.31101.00 Update 4
Microsoft .NET Framework
Version 4.5.53349

Installed Version: Professional

---Xamarin Products on Windows-
Xamarin   3.11.445.0 (5061f92)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.

Xamarin.Android (d23da369e436488f38c8ab8fe8a9ae7d9ea5256b)
Visual Studio plugin to enable development for Xamarin.Android.

Xamarin.Forms Intellisense   1.0
Provides intellisense for Xamarin.Forms in the XML editor.

Xamarin.iOS (7741cc495ab0baf04ff0405d0604bc27f0ecae2e)
Visual Studio extension to enable development for Xamarin.iOS.

Xamarin.iOS Unified Migration   1.0
Automated migration for Xamarin iOS Classic projects to Unified

Xamarin.TestCloud.Integration   1.0
Early preview of Xamarin Test Cloud integration

----------Xamarin info from MBP-------------------
=== Xamarin Studio ===

Version 5.9 (build 431)
Installation UUID: 9511a2db-83ea-4250-96d4-62bb4b9535ab
Mono 4.0.0 ((detached/d136b79)
GTK+ 2.24.23 (Raleigh theme)

Package version: 400000143

=== Apple Developer Tools ===

Xcode 6.3.1 (7703)
Build 6D1002

=== Xamarin.iOS ===

Version: (Business Edition)
Hash: 6481535
Branch: master
Build date: 2015-04-27 04:38:13-0400

=== Xamarin.Android ===

Version: (Business Edition)
Android SDK: /Users/lhughey/Library/Developer/Xamarin/android-sdk-macosx
Supported Android versions:
2.3   (API level 10)
4.0.3 (API level 15)
4.4   (API level 19)
Java SDK: /usr
java version "1.7.0_71"
Java(TM) SE Runtime Environment (build 1.7.0_71-b14)
Java HotSpot(TM) 64-Bit Server VM (build 24.71-b01, mixed mode)

=== Xamarin Android Player ===

Not Installed

=== Xamarin.Mac ===

Not Installed

=== Build Information ===

Release ID: 509000431
Git revision: 7560726734fc7267de2fa9abed2509968deefaa8
Build date: 2015-04-17 19:25:48-04
Xamarin addins: 2e772c734ab3148054eae7bf8949f340fdeb5e5e

=== Operating System ===

Mac OS X 10.10.3
Darwin Lyndons-MacBook-Pro.local 14.3.0 Darwin Kernel Version 14.3.0
    Mon Mar 23 11:59:05 PDT 2015
    root:xnu-2782.20.48~5/RELEASE_X86_64 x86_64

NM Nijamudeen Mohamed Sulaiman Syncfusion Team May 4, 2015 10:24 AM UTC

Hi Lyndon,

Thanks for the provided information. It helped very much.

We are unable to reproduce the mentioned issue with iOS build host. We have prepared a simple SfCircularGauge sample and followed below links to host Xamarin App in iOS from Visual studio. Please refer the below sample and Xamarin developer links.

Sample Link: SfGauge_Xamarin.zip

Xamarin Developer Links



And also we are trying to reproduce the issue in different configuration machines. It will be helpful, if you can provide us the steps you have followed to host iOS app to reproduce the issue along with screenshots (if possible). So that we can analyze more on your requirement and update you the possible solution.

Please let us know, if you have any queries.

Nijamudeen M.

LH Lyndon Hughey May 5, 2015 01:43 AM UTC

Thank you for looking into this.  I was able to reproduce this issue using another project, which points to it not being a configuraiton problem with your project/compoenent.  I was able to get your sample running today.  Thank you for all of your help!


NM Nijamudeen Mohamed Sulaiman Syncfusion Team May 5, 2015 06:40 AM UTC

Hi Lyndon,

Thanks for your update.

We are glad to know that you have met your requirement. If the issue reproduced please get back to us with the issue reproducing sample and its replication procedures.

Please let us know if you need further assistance.


Nijamudeen M.

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