This Enfocus PitStop command allows us to check if a PDF was created with PDFWriter. If so, the document will be marked as chosen in the "Log" area for further processing.
PDFWriter was a virtual printer driver that Adobe included with Acrobat between 1993 and 2003 (versions 1 to 6, when it was discontinued). Using PDFWriter as a virtual printer was easier and faster than using Distiller, which as a PostScript-PDF interpreter produced documents much more suitable for printing. The drawback of PDFWriter was that the PDFs it produced were of much poorer quality and they were not intended for printing. Hence this command that detects old documents produced with this driver.
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