Genicom GEK 00031B Programmer's Manual page 172

Chapter 7. Dec LG/Compaq LG Plus Emulation
▪ When using bar codes as part of the fill-in data, make sure that
the control character encoding character of the bar code differs
from the switch character in the Select Form sequence.
▪ Bar codes must start and end on the same page of a form.
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GEK-00029B