I have tryed something similar long ago, I solved it by deleting a few rows in the DB, think it was in the PropertyData table.

/Ronnie

Hi Hendrik,

I had the same issue a few weeks back and wrote a blogpost how to solve it. Hope it helps you.

Cheers,

Richard

@ronnie: which rows did you delete? :-)

@Richard: So adding this little thingie might help, you think?

obj = c.getProperty(this);

if (obj != null)

   obj.delete();

/Jesper

Hi, guys.

I thought this was fixed in 4.5 but I still get the same error when I add the data type (ImageCropper) for my media type (Image)

Can I use the same fix as above? (Can not immediately locate the files)

/Anders

I wanted to add that I was receiving this same problem and doing a an iireset fixed the problem (it was a full iisreset, not just the site, fyi - might have worked for just the site also, but I'm not sure).

Brian --

What version are you on?

I'm on 4.0.3 right now.

Hello folks

Let me raise this one from the grave ...

I'm on 4.7.0 and I just deleted a document property and created a new one.  First with the same alias and then with another, but either way gives me the attached error.

If the property is located on the 'Generic Properties' tab, it doesn't fail, but the property is hidden or gone so to speak.
If I move the property to a tab that is inherited from my master document, I get the attached error.

The original property was the DAMP- Media picker, but the new one is the uComponents - MultiNode Tree Picker.

My biggets problem is that the site is almost finished, and right now I cannot pick any media because of this error or create a new document that uses this document property.
So folks, I really need your help on this one.

Hi,

Please can any one help?

I am upgrading from 4.0.4.2 to 4.5. I have taken full copy of files and datbase and doing upgradation on back up. After 3rd step of upgradation, i am getting following error.

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
   umbraco.presentation.install.steps.defaultUser.Page_Load(Object sender, EventArgs e) +106
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

Thanks

Krishna

Any information regardin this

Sounds like maybe you didn't copy all the required files for the upgrade, are you sure copied the /bin/, /install/, /umbraco/ and /umbraco_client/ folders?  There are also some changes in the configs but I think this error is probably related to the install folder

i also get same error

my code is here ,

<form runat="server" id="aaass">

    <asp:ScriptManager runat="server">

    </asp:ScriptManager>

    <umbraco:Macro PollNodeId="1218" DisplayOnly="1" SubmitOnSelect="1" HideSubmit="1" SortResults="1" WidthTotalVotes="1" HideQuestion="1" RandomPoll="1" Alias="Poll" runat="server"></umbraco:Macro>

</form>

tell me any change in code

Thanks 

again

Hi,

Due to performance issue , I have added the publishing code in thread

 try

                    {

                        HttpontextforMailSending gethttpcontextforpublish2 = new HttpontextforMailSending()

                        {

                            HttpContextReference = HttpContext.Current,

                            courseDocument = shortCourseDocument,

                            createdUser = new User(0)

                        };

                        Thread t2 = new Thread(PublishDocument);

                        t2.Start(gethttpcontextforpublish2);

                    }

                    catch

                    {

                    }

 private void PublishDocument(object input)

        {

            HttpontextforMailSending httpcontextformail = (HttpontextforMailSending)input;

            Document course = httpcontextformail.courseDocument;

            User createduser = httpcontextformail.createdUser;

            if (course != null && createduser != null)

            {

                course.Publish(createduser);

                umbraco.library.UpdateDocumentCache(course.Id);

            }

        }

public class HttpontextforMailSending

    {

        public HttpContext HttpContextReference { get; set; }       

        public Document courseDocument { get; set; }

        public User createdUser { get; set; }

    }

but i got "Object reference not set to an instance of an object" error on "course.Publish(createduser);"

Please anyone help me to solving this.

Thanks

Jeeshna

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