Product

Platform

Operating system

Error

Symptoms

In very rare intermittent occurances, there have been cases where an image (photograph) in a PDF becomes corrputed when downsampled.

This corruption almost appears to be "static".

It might occur on only one image on the PDF. If the PDF is separated, it might only occur on one image of one separation of the PDF.

Refining the input PDF a second time (not re-refine of the already-processed page) will make the problem disappear.

It does not occur on PostScript.

NOTE: this problem is visible in proofs. However, in the case of separated input, this problem can be difficult to see (especially if the corruption occurs on the Yellow separation).

Cause

It is related to:

- input PDF that has images which are a high enough resolution that they require downsampling

- multiple Normalizers on the same Prinergy server

- high-load situations

Solution

If you are encountering this problem, you can use any one of the following solutions:

1. Upgrade to Prinergy 2.1 (this issue is not present in Prinergy 2.1).

2. Turn off all Downsampling options in the Optimizer (note that this will result in larger PDFs and possibly slower processing).

3. Split the Normalizer pool (for example, put Normalizer1 on Server1, and Normalizer2 on Server2).

Permanent fix:

See also

Keywords

normalizer, optimizer, PDF

Technical contact(s)

James Bredenhof

Submitted by

James Bredenhof

Date submitted

30 Dec 2002