hi,

I 'm getting this error "Uncaught TypeError: Cannot read property 'RmsSupportedExtensions' of undefined" from the file "core.js" in the "MasterPage Gallery", "List Template Gallery", "WebPart Gallery" when i try to select a document/item in that gallery. And the ribbon options under "Files" & "Library" tabs were disabled even though i am a site collection administrator. I am struggling with this issue from last couple of days? Everything was working fine before with no issues. Also, I haven't made any changes to the site or a template. Suddenly one day when i open the masterpage gallary and added a script file and then tried to publish the file and that where it is not allowing me to do so. I have attached couple of Screenshots.

Below is the Complete error Stack If this would help you in resolving the Issue:

"TypeError: Unable to get property 'RmsSupportedExtensions' of undefined or null reference\n   at AddDocLibMenuItems (static.sharepointonline.com/.../core.js:1:265960)\n   at BuildMenu (static.sharepointonline.com/.../core.js:1:228413)\n   at BuildMenuWithInit (static.sharepointonline.com/.../core.js:1:227645)\n   at SP.Utilities.Internal.ECBAdapter.prototype.$1y_0 (static.sharepointonline.com/.../sp.core.js:2:53788)\n   at SP.Utilities.Internal.ECBAdapter.prototype.$1X_0 (static.sharepointonline.com/.../sp.core.js:2:53504)\n   at SP.Utilities.Internal.ECBAdapter.prototype.$1t_0 (static.sharepointonline.com/.../sp.core.js:2:52113)\n   at SP.Utilities.Internal.ECBAdapter.prototype.canHandleECBCommand (static.sharepointonline.com/.../sp.core.js:2:51750)\n   at SP.Ribbon.ListViewWebPartPageComponent.prototype.canHandleCommand (static.sharepointonline.com/.../sp.ribbon.js:2:19497)\n   at SP.Ribbon.DocLibWebPartPageComponent.prototype.canHandleCommand (static.sharepointonline.com/.../sp.ribbon.js:2:58365)\n   at CUI.Page.FocusManager.prototype.callCommandHandlerForEnabled (static.sharepointonline.com/.../cui.js:1:334638)" 

When i select a document from the masterpage gallery:

I have encountered with the below error:

After passing through the error, And click on the "Files" tab from the Ribbon. It displays as all the options are disabled.

And click on the "Library" tab from the Ribbon, Does the same as all the options were disabled.

And Now i clicked on "Files" tab again and immediately i click back the "Library" tab, Now all the options were enabled. But in the "Files" tab all the options were enabled i.e "discard check-out", "Check-in", "Check-out", "Publish', "UnPublish", "Approve/Reject", "Cancel Approval" etc. And when i click on Approve, it does nothing.

Please let me know if you need more info.

Thanks

Hi Sai,

Please try to remove your custom script and check whether it works or not.

I can't find the property "RmsSupportedExtensions" in the "Core.js" file, if your code use it, the error will be occurs. I suggest you debug your code using IE F12 or you can provide the code for further research.

Best Regards,

Dennis Guo

Hi Dennis,

    We are experiencing the same issue in SharePoint Online, but without any custom js code.

    The problem appears in the call to function AddDocLibMenuItems(e, g, a, h, i) from core.js. Specifically, the error is thrown when a.ListSchema is accessed without a null check:

if (Boolean(a.ListSchema.RmsSupportedExtensions)) {
    var s = itemTable.getAttribute("ext").toLowerCase(),
    p = a.ListSchema.RmsSupportedExtensions.toLowerCase().split(","),
    q = p.indexOf(s) > -1;
    q && Flighting.VariantConfiguration.IsExpFeatureClientEnabled(524) && HasRights(0, 4) && !currentItemIsMountPoint && !j && !l && currentItemFSObjType != "1" && a.listBaseType == 1 && AddEncryptMenuItem(e, g, a, k, h, i)
}

• Edited by Luca Bogdan Grigorescu 18 hours 28 minutes ago

Hi guys got the same error :seems the core.js changed from version to version

16.0.4404.1210 core.js <- has the same bug and the buggy 

if (Boolean(a.ListSchema.RmsSupportedExtensions))

16.0.4316.1223 core.js <- dont have the bug

Best regards

Rodrigo Pinto, SharePoint MVP

• Edited by Scoutman MVPMVP 15 hours 36 minutes ago badformated

Hi Dennis,

    We are experiencing the same issue in SharePoint Online, but without any custom js code.

    The problem appears in the call to function AddDocLibMenuItems(e, g, a, h, i) from core.js. Specifically, the error is thrown when a.ListSchema is accessed without a null check:

if (Boolean(a.ListSchema.RmsSupportedExtensions)) {
    var s = itemTable.getAttribute("ext").toLowerCase(),
    p = a.ListSchema.RmsSupportedExtensions.toLowerCase().split(","),
    q = p.indexOf(s) > -1;
    q && Flighting.VariantConfiguration.IsExpFeatureClientEnabled(524) && HasRights(0, 4) && !currentItemIsMountPoint && !j && !l && currentItemFSObjType != "1" && a.listBaseType == 1 && AddEncryptMenuItem(e, g, a, k, h, i)
}

• Edited by Luca Bogdan Grigorescu Friday, August 21, 2015 1:10 PM

Hi guys got the same error :seems the core.js changed from version to version

16.0.4404.1210 core.js <- has the same bug and the buggy 

if (Boolean(a.ListSchema.RmsSupportedExtensions))

16.0.4316.1223 core.js <- dont have the bug

Best regards

Rodrigo Pinto, SharePoint MVP

• Edited by Scoutman MVPMVP Friday, August 21, 2015 4:02 PM badformated

Hi i am also getting same issue while downloading Master pages