Oracle Solution for Error ora-12096

ORA-12096: error in materialized view log on "string"."string"

What triggered the Error:

There was an error originating from this materialized view log. One possible cause is that schema redefinition has occurred on the master table and one or more columns in the log is now a different type than corresponding master column(s). Another possible cause is that there is a problem accessing the underlying materialized view log table.

What should we do to fix it:

Check further error messages in stack for more detail about the cause. If there has been schema redefinition, drop the materialized view log and recreate it.