Under certain conditions, issues may be experienced when printing to an HP LaserJet 4 printer with CorelDRAW . The majority of these issues involve the following: Error 20 (MEM OVERFLOW) Error 21 (PRINT OVERRUN) Slow Printing Incorrect Fill Patterns Inconsistent Gray Shading Note: Before proceeding with this documents, ensure that you have the latest HP LaserJet driver installed. This will solve most issues with CorelDRAW. Contact HP for information on the latest driver for your printer. Error 20 (MEM OVERFLOW) HP GL/2 Graphics Mode An error 20 occurs if the printer does not have sufficient memory to print a document. While this problem can occur when in the HP GL/2 or the Raster Graphics Mode, it is most likely to occur when the printer driver is in the default HP GL/2 Graphics Mode. An error is more likely to occur in this mode because the printer does not support the ROP (Raster Operations) codes, that Windows expects vector graphics devices to use. Because ROP codes are not supported, CorelDRAW attempts to work around the problem by creating gradient and pattern fills composed of small polygons. Depending on the graphic being printed, large numbers of polygons can be required to create the fills, and the printer may not have sufficient memory to print the document. This can also occur in the Raster Graphics Mode because there is insufficient memory in the printer to print the document in the current resolution. The amount of memory available in the printer also depends upon the Page Protection setting for the printer. Additional memory will become available for printing documents if Page Protection is turned off. Error 21 (PRINT OVERRUN) An Error 21 occurs if a document is too complex for the HP LaserJet 4 printer to format and print without enabling the printer Page Protection option in Windows. To enable the HP LaserJet 4 Page Protect option, the following total printer memory is required: PCL PostScript Page Size 300 dpi 600 dpi 300 dpi 600 dpi Letter/A4 2 MB (0.8) 6 MB (1.9) 2 MB (1.0) 6 MB (2.3) Legal 3 MB (1.6) 6 MB (1.0) 3 MB (1.7) 6 MB (1.3) Note: The numbers enclosed in parentheses reflect the amount of printer memory available to the user. Slow Printing Print speed problems occur in CorelDRAW 3 if HP GL/2 is the selected Graphics Mode. The following procedure may improve print speed if the latest revision of CorelDRAW 3 is installed: 1. Open the CORELDRW.INI with Notepad. This file is found in the DRAW directory. 2. Located the [CdrawConfig] section, and enter the following line exactly as shown: UseClippingForFills=O 3. Save, and close the CORELDRW.INI file. 4. Restart CorelDRAW. Print speed may be improved by making the above changes. Print speed, however, is largely dependent on information in the file being printed. Incorrect Fill Patterns Bitmap fills print incorrectly if the fill graphic is larger than 32 KB and HP GL/2 Graphics Mode is being used. This problem occurs because PCL pattern fills cannot exceed 32 KB. In addition, color to black and white is not implemented for foreground and background colors in bitmap fills. There are three possible solutions for this issue: Print the image using Raster Graphics Mode rather than HP GL/2 Graphics Mode. Print the image at 300 dpi instead of 600 dpi. Decrease the size of the bitmap fill. Inconsistent Gray Shading Inconsistent gray shading occurs because there are gray shade variations between images created in CorelDRAW 2 and 3. There are also gray shade variations between images printed using the HP GL/2 and Raster, and Graphics Modes. In CorelDRAW 3, differences from HP GL/2 gray shading are apparent when printing in the Raster Graphics Mode at 300 or 600 dpi. The gray shading is considerably darker in the Raster Graphics Mode. The HP GL/2 Graphics Mode seems to give a better representation of each of the gray scale percentages . When using the Raster Graphics Mode, shading differences in images may occur between CorelDRAW 2 and 3. Grays are lighter in CorelDRAW 2 giving a better representation of the gray scale for the percentage of black wanted.