User`s guide

TROUBLESHOOTING

Graphics Programming Issues

Graphics programming is inherently more complex than ASCII

programming, but is subject to the same problems. Resolve any ASCII

programming problems before spending too much time troubleshooting

graphics files.

If you can successfully print ASCII format files, try printing a proven

graphics label format file. If a proven graphics file will not print, suspect

a printer/host communications problem. Continue troubleshooting using

the information below if a proven graphics file prints satisfactorily.

Printer does not print graphics.

50. Cause: You are not sending pure binary data to the printer.

Cure: Do not try to send graphics data to the printer using a text

editor or word processor. Text editors format their output as

printable characters rather than pure binary. Program graphics

using software that is designed to handle pure binary data.

51. Cause: the graphics file does not start with the proper character.

Cure: Always start foreground graphics files with the @ character

(ASCII 64). Start background graphics files with the # character

(ASCII 35). Labels programmed in the background do not print

immediately. They remain in memory and print with a foreground

label format.

52. Cause: Your graphics file does not contain enough data to fill the

specified number of dot rows.

Cure:

Always send exactly enough data to fill the number of rows

specified in the format header line. Consider reducing print width or

use the LOGO command when printing small graphics.

Printer prints a random pattern instead of the expected bitmap.

53. Cause:

The printer is set for a different pitch or width than the

graphics file was designed for.

Cure: Before sending graphics to the printer, send a dummy label

format consisting of a header line, WIDTH command, PITCH

command, and END statement. This assures that the printer is set

properly before sending the graphics data.