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The biggest drawback with using Host Print Transform (HPT) is that you're using iSeries resources to build the bit map (or PCL data stream), plus network resources to download this information across your network to the printer. Because EACH PAGE needs to be transformed and sent, the volume per print job is a lot larger than IPDS.

If the page count is low or it's a local connection you won't notice the extra traffic. If the volume increases, you can clog your network.

The advantage of IPDS is that the variable data is kept separate from the overlay. The overlay is sent to the printer once and is cached at the printer; the variable data is all that has to be sent for each page. As I understand it, the printer should be able to cache several overlays (depending on available memory). This allows subsequent print jobs to re-use the overlay and avoid the extra time to download it.

--Paul E Musselman
PaulMmn@xxxxxxxxxxxxxxxxxxxx

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