Hi, We have created few MV's with "refresh fast on commit" option but now when we are trying to run our application that populate base tables of MV we are getting error: "Oracle.DataAccess.Client.OracleException ORA-01591: lock held by in-doubt distributed transaction 19.7.8379" So before we debug this more, can someone post the feedback whether fast refresh is allowed when using DTC transactions? Thanks --Harvinder -- //www.freelists.org/webpage/oracle-l