What To Do When You Get PostScript Errors on A Color LaserWriter 12/600 PS

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By Ken Applebaum

PostScript file corruption may cause your Apple Color LaserWriter 12/600 to generate various error messages such as: a "set limitcheck", "VM Storage", "Offending command...", or "Range Check" error has occurred. Sometimes the printer LEDs might blink and then nothing prints. These errors may be intermittent and may occur in different documents and applications.

Many programs use QuickDraw to edit the images visually, then use Postscript to print. These errors are typically not due to hardware and a Clean Install usually will not repair the problem. These problems are usually due to corruption in one or more elements in the output PostScript file. This article relates to errors in the saved Postscript information. Follow these procedures to try to isolate and correct the problem. Restart the printer to clear the buffer in the printer. Then try the following procedures:

Corruption in an imported graphic

Step 1
Go into the original application that created the graphic
Step 2
Select the elements of the graphic and copy them to the clipboard.
Step 3
Note: it is important not to select all in the original file, sometimes elements in a file may not have been deleted properly and the printer can not interpret them.
Step 4
Paste the elements into a new file and save.
Step 5
Try printing again. If it still fails go to Step 6.
Step 6
Import the working graphic (one that you know is OK) into the selected program (PageMaker, Word) and try to print again.

Large graphic elements

Check for large elements that have been reduced. These images still comprise a large number of elements, and to Postscript, their actual size does not matter. Eliminate or redraw them, save the file, and try to print again.

Output resolution too high

Check for output resolution. It should not be above 150 DPI (PageMaker, Illustrator, Freehand). The 12/600 is a 600 DPI printer, the maximum resolution Contone Compression keeps is 150 DPI. It will image the file at 600, but reduce it to 150 to fit the file through the ROMs.

Postscript interpretation memory conflict

Check Split Long Paths option in Illustrator or Freehand. These are Bezier curve drafting programs, long paths or connected segments can crash a Postscript interpreter when it runs out of storage area.The Famous Apple!

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