When I want to copy a page in my DNN Portal I get an error like this:

خطا : در حال حاضر در دسترس نیست( DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at avt.NavXp.NavXpController.DotNetNuke.Entities.Modules.IPortable.ImportModule(Int32 ModuleID, String Content, String Version, Int32 UserID) at DotNetNuke.Modules.Admin.Tabs.ManageTabs.SaveTabData(String strAction) at DotNetNuke.Modules.Admin.Tabs.ManageTabs.cmdUpdate_Click(Object Sender, EventArgs e) --- End of inner exception stack trace ---

Wen I check page Some modules that they was "Show on all pages in settings" and some other modules not copied and Then I check the Log Viewer page for more information but there was no any error submitted in my Log Viewer!!!!

 What's happen for my site?

PLEASE URGENT.

Dear Sebastian

I do it like ever in 6 years ago:

1. I have several page that there is 4 modules shared to all of them, because I was checked "display module to all pages" before on module settings.

2. Before, When I Add new Page or Copy a page with new title, These pages has been created by Shared modules as I check that check box on module settings before without any error. But...

3. Now I do same before and I copy a page only. It means DNN should copy page with current modules and All Shared Modules a new Page title. But...

 4. I got that error.... I never seen Shared modules when I copy them in list of modules in copy tab. you asked me Uncheck them but there is not there....

Please help, I could not Copy any page correctly. :(