<str>.<str> is not supported in this context

  Explanation:  You included the COMPUTED_BY field named in this
  error message in the SELECT FIELDS clause of a DEFINE TRANSFER
  statement.  This COMPUTED_BY field uses a value expression that
  is unsupported.

  User Action:  Re-enter the DEFINE TRANSFER statement and omit
  the COMPUTED_BY field that uses the unsupported value
  expression.  Refer to the DEFINE TRANSFER statement in the
  Replication Option for Rdb Handbook for information on what
  value expressions are supported.