Hi, with some trial and error, I was able to determine the below error, which I find on product pages every so often, is caused by there not being a product page set.

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Exception: Object reference not set to an instance of an object. Stack Trace: at AbleCommerce.Controllers.ProductController.ProductTabs(ProductTabsWidgetParams parameters, Int32 id, Int32 categoryId) at lambda_method(Closure , ControllerBase , Object[] ) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass24_0.<InvokeActionMethodWithFilters>b__0() at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) at System.Web.Mvc.Controller.ExecuteCore() at System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) at System.Web.Mvc.Async.AsyncResultWrapper.<>c.<.cctor>b__15_0(IAsyncResult asyncResult, Action action) at System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) at System.Web.Mvc.MvcHandler.<>c.<BeginProcessRequest>b__20_1(IAsyncResult asyncResult, ProcessRequestState innerState) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) at System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) at System.Web.Mvc.HttpHandlerUtil.ServerExecuteHttpHandlerWrapper.<>c__DisplayClass5_0.<Wrap>b__0() at System.Web.Mvc.HttpHandlerUtil.ServerExecuteHttpHandlerWrapper.Wrap[TResult](Func`1 func) at System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride)
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When the product page causes it, it always causes it. The error is visible to the user, on the product page, on the left, under the image. And the product description does not display.

It would be nice if AC handled the lack of a category a little more gracefully. I was able to figure out the cause by looking at the Tabs (first line of the error) of a working page, and noticed there's a "related categories" tab. I'm guessing it fails hard without a category, to the point of the description not showing either?

Thanks,
Charles

Hi, correct, these come up when there are no categories.

It's possible these products were created in AC gold before we converted to AC9, if that helps?

You're correct; you can't save the category tab without having a category selected. But it's not required to click on the category tab after creating a new product?

There must be some way the user figured out how to add it without a category.

I've seen this error a few times, and only today did I figure out what causes it.

I'll let you know if I see it again.

Thanks!

I scoured the error logs and found this one product is the only product that has had the error in the recorded history of errors.

Granted I do purge the error log of old data every so often, but it's entirely possible this is the only page that has had the error.

I'll post if I see it again.

Thanks again for your prompt response Katie!

Charles

I've spent some time trying to reproduce this issue with no luck.

I created several categories, assigned a product to each of them, and then removed some of the extra categories. The product remains and is still attached to the first category.

I also added a product to a category, then assigned it to another category. Removed the first category and the product is still attached to the second category.

Whatever the steps are to reproduce, it must not be too common. If there is any other information to report, please post it here.