Hi,

  We have migrated our site from Episerver 5.2 to 7.0. For one page in edit mode it showing following error message. We also not able to delete that page.

User Agent    Mozilla/5.0 (Windows NT 6.1; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0
Url    https://servername:443/EPiServer/CMS/no/TestPage,,2565_8541/?id=2565_8541&epieditmode=true&epiworkspaceactive=true
Referer    https://servername/EPiServer/CMS/Home?language=no

Specified argument was out of the range of valid values.
Parameter name: index
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
Parameter name: index

Please suggest.