In Chapter 4, under the "Installing the AS/400 (iSeries) warehouse agent" section, under the "Post-installation considerations" subsection, change the first paragraph to:
The warehouse agent performs all step functions in a single unit of work. Prior to V4R5, DB2 Universal Database for iSeries limited the number of rows that can be inserted in a single commit scope to 4 million. This limitation has been increased to 500 million rows in V4R5. If you are using a V4R4 (or below) system and have queries that exceed this size, either subdivide the queries or use the warehouse-supplied FTP programs to move data.