ORA-12096: error in materialized view log on "[string]"."[string]"
Cause: 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.
Action: 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.