Error: Unable to display this Web Part

Question

Hi, I need solution for this error. Error : Unable to display this Web Part. To troubleshoot the problem, open this Web page in a Microsoft SharePoint Foundation-compatible HTML editor such as Microsoft SharePoint Designer. If the problem persists, contact your Web server administrator.

Rajkiran Swain · Answer

If you dig into the error logs you will find that this is reported as “Error while executing web part: System.StackOverflowException”. Turns out though that it is a timeout of the XSLT parser and has been around for quite a while. The fix is pretty easy, if you are on premises, just run a tiny PowerShell script from the SharePoint Management Shell. $farm = Get-SPFarm $farm.XsltTransformTimeOut = 10 $farm.Update() Some of the articles say to increase it from the default of 1 second to 5 seconds. In my test environment I typically needed to increase it to 10 seconds. If you monitor the CPU on the server you will see that at least on lab-type virtual machines that a page load where you have this issue does put quite a load on the CPU. SharePoint Online? No joy for you! It appears that the default is 1 second, and you can’t change it.

Vivek Kumar · Answer

Have a look onto below links. https://stackoverflow.com/questions/5071739/error-unable-to-display-this-web-part https://blogs.msdn.microsoft.com/spdsupport/2008/06/06/how-to-fix-recieve-error-unable-to-display-this-web-part-on-data-views-after-restoring-site-from-backup/ http://www.erinbglenn.com/Lists/Posts/Post.aspx?ID=52 https://thechriskent.com/2012/06/18/intermittent-unable-to-display-this-web-part-messages/

Sundaram Subramanian · Answer

Cause: This is a known issue, actually. We have done some work for O14 which will address this problem. The issue is caused by the incorrect ListName, which is a GUID id for the list’s instance on a given site instance. We don’t do GUID fix-up, and therefore the broken data views are pointing to the incorrect data source (from the old site). Workaround: Start SharePoint Designer, and open page containing broken data view(s). In SharePoint Designer’s menu, click Task Panes -> Data Source Library. From the Data Source Library task pane, drag in a new instance of the broken data view’s data source (example: Announcements list) onto the page. This will create a new and working data view. Highlight the newly inserted data view, and go into split view (half code, half design). From the code portion highlighted, look for the ListName property. Note: it should be on the first line of the highlighted code, but you may have to scroll to the right in order to see it. Once you find the ListName property, copy everything in between { … } (without the braces). Store that value, as we will need it later (example: paste into Notepad). Remove the newly inserted data view. Highlight the broken data view, and go into split view (half code, half design). From the code portion highlighted, look for the ListName Property. Note: it should be on the first line of the highlighted code, but you may have to scroll to the right in order to see it. Once you find the ListName property, copy everything in between { … } (without the braces). In SharePoint Designer’s menu, click Edit -> Replace. In the “Find What” portion, paste in the broken data views ListName value. In the “Replace With” portion, paste in the previous working data view’s ListName value (example: the one stored in Notepad). Click Replace All, and let the process finish. Click close. Perform steps 3 – 9 for each respective data view.