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windows-runtimeuwpwindows-10-mobile

EmailManager.ShowComposeNewEmailAsync Exception The parameter is incorrect 'User'

My UWP apps suddenly throw the following exception on Win 10 Mobile Build 10.0.14342.1001. They still work fine in the emulators. Is anybody experiencing the same problem? Is there a workaround?

Exception thrown: 'System.ArgumentException' in mscorlib.ni.dll WinRT information: user Additional information: The parameter is incorrect. user

To ensure the problem is not related to something specific with the apps email messages I sent the following simple message which causes the same problem.

Dim em As New Windows.ApplicationModel.Email.EmailMessage
em.To.Add(New EmailRecipient("[email protected]"))
em.Subject = "test"
Await EmailManager.ShowComposeNewEmailAsync(em)

Link to test case.

Solution

  • This is a bug in the insider build. No workaround known.

    MS was informed about it via feedback and the MS forum.

    Got fixed with Windows 10 Mobile Insider Preview Build 14356.