Do you mean you upgraded from Umbraco 7.2.5? Also, can you paste in a stack trace?

Yes, you're correct. I can't even get 7.3.0 to install using the custom installer(sql server over sqlce).

[NullReferenceException: Object reference not set to an instance of an object.] Umbraco.Web.UmbracoHelper.Field(String fieldAlias, String altFieldAlias, String altText, String insertBefore, String insertAfter, Boolean recursive, Boolean convertLineBreaks, Boolean removeParagraphTags, RenderFieldCaseType casing, RenderFieldEncodingType encoding, Boolean formatAsDate, Boolean formatAsDateWithTime, String formatAsDateWithTimeSeparator) +113 ASP.PageViewsMasterViewcshtml.Execute() in k:\Projects\Acch\h.ERN.ERN.Web.Beta\Views\MasterView.cshtml:12 System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +197 System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +97 System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +88 System.Web.WebPages.<>cDisplayClass7.6(TextWriter writer) +233 System.Web.WebPages.HelperResult.WriteTo(TextWriter writer) +10 System.Web.WebPages.WebPageBase.Write(HelperResult result) +71 System.Web.WebPages.WebPageBase.RenderSurrounding(String partialViewName, Action1 body) +64 System.Web.WebPages.WebPageBase.PopContext() +246 System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +95 System.Web.WebPages.<>c__DisplayClass7.<RenderPageCore>b__6(TextWriter writer) +233 System.Web.WebPages.HelperResult.WriteTo(TextWriter writer) +10 System.Web.WebPages.WebPageBase.Write(HelperResult result) +71 System.Web.WebPages.WebPageBase.RenderSurrounding(String partialViewName, Action1 body) +64 System.Web.WebPages.WebPageBase.PopContext() +246 System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +95 System.Web.WebPages.<>cDisplayClass7.6(TextWriter writer) +233 System.Web.WebPages.HelperResult.WriteTo(TextWriter writer) +10 System.Web.WebPages.WebPageBase.Write(HelperResult result) +71 System.Web.WebPages.WebPageBase.RenderSurrounding(String partialViewName, Action1 body) +64 System.Web.WebPages.WebPageBase.PopContext() +246 System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +95 System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +258 System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +115 Umbraco.Core.Profiling.ProfilingView.Render(ViewContext viewContext, TextWriter writer) +151 System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +295 System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13 System.Web.Mvc.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17() +23 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func1 continuation) +242 System.Web.Mvc.<>cDisplayClass1c.19() +21 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func1 continuation) +242 System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +21 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList1 filters, ActionResult actionResult) +177 System.Web.Mvc.Async.<>cDisplayClass2a.20() +89 System.Web.Mvc.Async.<>cDisplayClass25.22(IAsyncResult asyncResult) +102 System.Web.Mvc.Async.WrappedAsyncResult1.End() +57 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +43 System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +14 System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23 System.Web.Mvc.Async.WrappedAsyncResult1.End() +62 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +57 System.Web.Mvc.Async.<>cDisplayClass4.3(IAsyncResult ar) +23 System.Web.Mvc.Async.WrappedAsyncResult1.End() +62 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +47 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10 System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +25 System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23 System.Web.Mvc.Async.WrappedAsyncResult1.End() +62 System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +47 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9658396 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

Not sure what you mean by "custom installer(sql server over sqlce)".

How are you installing 7.3? Are you using the beta download at: https://our.umbraco.org/contribute/releases/730

Or are you building it yourself from GitHub?

I'm seeing the same issue. Something in the UmbracoHelper seems to be null. Requesting a field causes an unhandled null reference in umbraco.dll.

The back office seems to work fine though.

This is the error that I am getting. All of my code is part of a plugin solution that is imprinted on a fresh install of Umbraco. It works on 7.2.6 but throws this error on 7.3-beta.

   at Umbraco.Web.UmbracoHelper.Field(String fieldAlias, String altFieldAlias, String altText, String insertBefore, String insertAfter, Boolean recursive, Boolean convertLineBreaks, Boolean removeParagraphTags, RenderFieldCaseType casing, RenderFieldEncodingType encoding, Boolean formatAsDate, Boolean formatAsDateWithTime, String formatAsDateWithTimeSeparator)
   at ASP._Page_Views_Home_cshtml.Execute() in Home.cshtml:line 7
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
   at Umbraco.Core.Profiling.ProfilingView.Render(ViewContext viewContext, TextWriter writer)
   at System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)

My initial guess was that this had to do with a mismatch in MVC or Razor versions since our plugin is in a separate project and includes references to the umbraco dlls as well as mvc and razor dlls...so I tried to match our project nuget-wise to the packages.config in the 7.3 branch but it seems pretty obvious that I'm missing something.

Update: upgraded to 7.3-beta2 built from source but the issue persists.

What I've learned so far from debugging:

1. The node has data. I see a XmlPublishedProperty with a PropertyTypeAlias of "text" and a non-null DataValue. So, the data is there.

If I remove every instance of @Umbraco.Field(), it will render random html.

@CurrentPage.Field("text") fails quietly, no exception -- but also no data displayed.

-- Solution --

Ok, I think I might have figured it out...the "Field()" methods in UmbracoHelper use a local instance variable called _componentRenderer that is null (in some cases, at least), when they should instead be using the public "lazy instantiation" member, "UmbracoComponentRenderer" instead.

Created a pull request: https://github.com/umbraco/Umbraco-CMS/pull/744

Thanks,

Timothy

P.S. Thanks to whoever fixed the forum's post formatting!

Update

Shannon merged the pull request so this is fixed if you pull from the dev-v7 branch.

I would assume it will make its way into the next beta release.

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