according to them , they try to rearrange the menu's on the leftside of the cms and that errors occured
Hmm... so that might be something. If there's a problem with the parent ids of something, it might be getting caught in a loop
The menus you're talking about... are these part of the standard CMS, or something custom, a sortable gridfield, etc.?
yes they add a new page on the preschool classses under programs menu
but im inspecting the Page.php it has a custom menu's included i think
should i edit the database manually to detect which page have problem ? it should be SiteTree_Live Table ?
Is there any way to validate the text field as a text only field?
I mean user can add just text only.