The DTM creates a reject file for each target instance in a mapping or web service operation mapping. If the DTM cannot write a row to the target, the DTM writes the rejected row to the reject file. If the reject file does not contain any rejected rows, the DTM deletes the reject file when the job completes.
By default, the DTM stores reject files in the directory defined by the Rejected Files Directory property for the Data Integration Service. The DTM names reject files based on the name of the target data object. The default name for reject files is