Message Oracle ORA-12008 - error in materialized view refresh path

ERROR	error in materialized view refresh path
CAUSE	Table SNAP$_ reads rows from the view MVIEW$_, which is a view on the master table (the master may be at a remote site). Any error in this path will cause this error at refresh time. For fast refreshes, the table .MLOG$_ is also referenced.
ACTION	Examine the other messages on the stack to find the problem. See if the objects SNAP$_, MVIEW$_, .@, .MLOG$_@ still exist.

636475	Secondary Oracle error codes
741478	FAQ: Materialized views