Can the dateLstUpdDat field in the Execution Confirmation contains a value of zero?
If you enter an order and the order does not go into the orderbook (i.e. partial executed IOC/FOK order, directly full executed market / limit / market to limit / iceberg – order) then you receive a dateLstUpdDat of zero in the Execution Confirmation. Generally speaking the values are not needed once the lifetime of the order ends.