Attempted to read or write protected memory.This is often an indication that other memory is corrupt

Hi,

I have a scheduled datarefresh that is failing with this error:
We're sorry, an error occurred during evaluation. Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Attempted to read or write protected memory.
This is often an indication that other memory is corrupt.
Attempted to read or write protected memory.
This is often an indication that other memory is corrupt.
Attempted to read or write protected memory.
This is often an indication that other memory is corrupt.
Attempted to read or write protected memory.
This is often an indication that other memory is corrupt..
The exception was raised by the IDbCommand interface. Table: XXXXXXXXXXXXXXXXXXXXXXXX

Anybody knows the reasons of this error or how fix it?

The datarefresh was succesfully since weeks.

Thanks.