To trap the edges of every color that requires trapping, the trapping engine creates a large number of paths that are used only by the output device (the paths are not stored in your document). While Adobe In‑RIP Trapping processes and stores these additional paths at the RIP, built‑in trapping uses your computer’s hard disk as a temporary storage area for these trap paths. Before you use built‑in trapping, make available as much hard disk space as possible.

The amount of disk space you’ll need depends on a wide range of factors, so it isn’t possible to predict exactly what a particular trapping job will require. However, disk space requirements are most likely to increase when one or more of the following characteristics of your document increase:

• Number of pages included in trapping page ranges.

• Number of overlapping color objects.

• Number of images that need to be trapped.

• Amount of text that needs to be trapped.

• Resolution of final output.

  If the processing of a job that uses built‑in trapping is interrupted or exhausts your disk space, trapping data may be left behind on your hard disk. When necessary, you can exit the application, and then find and delete temporary data in the C:\Temp folder (Windows). In Mac OS, restart your computer.