"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.