I am trying to get a modal to appear when the site loads.

  • I created a site page called Disclaimer.aspx and stored it in the Site Pages document library.
  • I created a text document called popup.txt and stored it in my Shared Documents.
  • I added a content editor webpart to my home screen and linked it to the popup.txt file

Onload the page displays the modal however, the Disclaimer.aspx page isn't showing. I am getting a Error: An unexpected error has occurred

Contents of popup.txt:

 <SharePoint:ScriptLink ID="ScriptLink21" Name="sp.js" runat="server" OnDemand="true" 

Localizable="false" />

<script type="text/ecmascript">
    ExecuteOrDelayUntilScriptLoaded(ShowDialog, "sp.js");

    function ShowDialog() {

        var options = {
                url: '../SitePages/Disclaimer.aspx',
                height: 500,


I tried the code with the full path and I get the same error.


  • Try with adding script editor webpart on page and add your modal pop up script in it. remove content editor webpart. Sep 20, 2016 at 18:01
  • The CEWP method should work. But, I would not be calling the same page modal from within the page, It sounds recursive to me. Sep 20, 2016 at 18:14
  • There's a correlation ID. Can you check what's the error in the uls logs? My guess is that's related to the target page itself, not the way you open the page.
    – Steve B
    Sep 22, 2016 at 15:21

2 Answers 2


You should first ensure that the Disclaimer.aspx is not a wiki page it should be web part page to avoid An unexpected error has occurred ,

If everything is OK , try to add the following code at your CEWP

<a href="#" onclick="javascript:SP.UI.ModalDialog.showModalDialog({ url: '../SitePages/Disclaimer.aspx', title: 'Disclaimer' }); return false;"  >Click Here</a>

Also, you can try to use the following code

function openDialog(pageUrl) { 
var options = {
    url: pageUrl,
    title: 'Title of the Dialog',
    allowMaximize: false,
    showClose: true,
    width: 500,
    height: 500
SP.SOD.execute('sp.ui.dialog.js', 'SP.UI.ModalDialog.showModalDialog', options);       

<a href="#" onclick="openDialog('http://path/SitePages/Disclaimer.aspx');">Disclaimer</a>

Both samples have been worked for me without issue ,

Check also the detail steps at Open a link via Modal Dialog in SharePoint

  • Does disclaimer.aspx need to be a webpart page or can it be a wiki page?
    – Jammin4CO
    Sep 22, 2016 at 15:23
  • 1
    Dear @Jammin4CO it's very good question , I am pretty sure it only works for web part page not wiki, the behavior that he mentioned in his question is because he uses wiki page not web part page, I also update my answer with this info, and this mentioned in the attached article Sep 22, 2016 at 16:16

Remove the below from popup.txt since these tags don't work\belong here

SharePoint:ScriptLink ID="ScriptLink21" Name="sp.js" runat="server" OnDemand="true" Localizable="false" />

Add the sp.js explicitly using script> tag

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