H

I am trying to incrementally update a shared dimension. I have suddenly started getting the following error in the processing

"Analysis Server Error: File error [Seek operation] ' The handle is invalid. The handle is invalid. '

As soon as you try anything further in AS, AS restarts itself. There is no more detail than that in any of the other logs. Event Log says AS failed, try restart, has done it (x) times before. There are then a MSSQL and MSSQLAgent error that follow it which also have no specific details

Does anyone know what is happening or how to try and resolve this

Thank
Mike