My bad. I had the lcdout subroutine improperly exiting...

for example:

GOSUB display
disp_return: next line of code, and so on


display: LCDOUT "blah, blah, blah"
goto disp_return

I copied the code from another program, but that program had a "IF, THEN"
statement that determined what display subroutine to go to and I overlooked
the new subroutine.

Thanks for the help.