List View Mass Update Error

Hi All,

               I was doing a mass update for the list view of Accounts the first 1000 records.

1.Error Mass Update failed. Initiating new attempt (3 of 3).Error Mass Update failed. Initiating new attempt (3 of 3).

2.Internal error The server encountered an error and could not complete your request.Please try again. If the error persists, please contact your Sugar Administrator.

I also noticed that the mass update list check boxes were not ticked for few records in the list view.Which has be defaultly ticked when i select the first 1000.

This is occurring only for Accounts and remaining modules are fine

When i check console i can see like

"<>/rest/v10/Accounts/MassUpdate Failed to load resource: the server responded with a status of 500 (Internal "

Can any one please give me suggestion David López Mehul  Bhandari

Regards

Sidhu