StructureMap null reference exception when calling ASP.NET MVC Controller

[Georgia Mackey]

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I am having an issue and i'm stumped so I'm hoping someone can help. I am clicking a button on my webpage (view) and it should call a controller method but instead it looks like structuremap is having an issue building the controller. I know everything is built properly because a) this has been in production for years and b) the link i'm following when I get the error is from the same controller. I am unable to reproduce this on my dev machine. Could anyone give me some advice on how to troubleshoot? 2017-09-19 08:00:45,231 [563] ERROR WebPortal.Global [(null)] - Object reference not set to an instance of an object. at WebPortal.Controllers.EnrollmentController..ctor(ISystemUtility systemUtility, IObjectAdapter`2 userToCurrentUserViewModelAdapter, ILogger logger) at lambda_method(Closure , IBuildSession , IContext ) 2017-09-19 08:00:45,184 [563] ERROR WebPortal.Global [(null)] - Error while building type WebPortal.Controllers.EnrollmentController. See the inner exception for details 1.) new EnrollmentController(*Default of ISystemUtility*, *Default of IObjectAdapter<User, CurrentUserViewModel>*, *Default of ILogger*) 2.) WebPortal.Controllers.EnrollmentController 3.) Instance of WebPortal.Controllers.EnrollmentController 4.) Container.GetInstance(WebPortal.Controllers.EnrollmentController) at lambda_method(Closure , IBuildSession , IContext ) at StructureMap.Building.BuildPlan.Build(IBuildSession session, IContext context) at StructureMap.SessionCache.GetObject(Type pluginType, Instance instance, ILifecycle lifecycle) at StructureMap.SessionCache.GetDefault(Type pluginType, IPipelineGraph pipelineGraph) at StructureMap.Container.GetInstance(Type pluginType) at WebPortal.InjectableControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType) at System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName) at System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory) at System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) at System.Web.HttpApplication.CallHandlerExecutionStep .System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

[Jeremy Miller]

That’s not a StructureMap error per se. Something inside of your constructor function is hitting a NullReferenceException.

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