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Could not get unique plugin attribute for type Itera.Property.PropertyFolderUrl error while upgrading the site from 6R2 to 7


Hi ,

I am working on upgrading the site from CMS 6R2 to 7. I have already solved many issues occuring while upgrading but I am stuck presently at this and is finding no solution in Internet to go forward.

I am witnessing this error:-


Could not get unique plugin attribute for type Itera.Property.PropertyFolderUrl. Both 'EPiServer.PlugIn.PageDefinitionTypePlugInAttribute' in 'EPiServer, Version=7.0.586.1, Culture=neutral, PublicKeyToken=8fe83dea738b45b7' and 'EPiServer.PlugIn.PropertyDefinitionTypePlugInAttribute' in 'EPiServer, Version=7.0.586.1, Culture=neutral, PublicKeyToken=8fe83dea738b45b7' matches 'EPiServer.PlugIn.PropertyDefinitionTypePlugInAttribute'. 

I have changed the PageDefinitionTypePlugIn to PropertyDefinitionTypePlugIn whereever it is used in custom properties . I have also searched in my website and in one page i found the use of class here is the code

 if (isMainBodyForProfileActivated)
                Itera.Examples.Property.PropertyMulitPageLinks multiProp = new Itera.Examples.Property.PropertyMulitPageLinks();


                foreach (PageData page in multiProp.GetPages())
                    if (!PageReference.IsNullOrEmpty(page.PageLink) && page.ACL.QueryDistinctAccess(EPiServer.Security.AccessLevel.Read))
                        contentDiv.InnerHtml = page.GetStringProperty("MainBody").ToString();

                ctrlBody.Visible = false;

but after removing this also the problem exist. Can anybody help me with this?

Oct 13, 2015 12:01

My sugestions is to remove that property completly and rewrite it with new approach. I have had the same experience and we did not upgrade the website instead we migrate the content of the website to a new cms 7 website with complete new code.

It could be the fact that you actually need to change stuff regarding the custom property directly into the database. This is a generic error and not related to Itera property since you will get this error with a lot of custom properties.

Oct 15, 2015 15:48
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