LCD_DATAUS and LCD_COMMANDUS are constants that you must declare in your program. Shown in the first post of this thread.
Code:
LCD_Lines     CON 2    ' # of Lines on LCD,  1 or 2 (Note: use 2 for 4 lines)
LCD_DATAUS    CON 50   ' Data delay time in us 
LCD_COMMANDUS CON 2000 ' Command delay time in us
They are not optional.
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