Accu-Chek Aviva User Manual page 66

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Your blood glucose level
may be extremely low,
or the test strip may be
damaged or not properly
inserted. If you see this
error message after
you applied blood to the
test strip, see Chapter 2
"Unusual Test Results."
If you see this error
message before you
applied blood to the test
strip, remove the test
strip and reinsert it, or
replace it if damaged. If
the message reappears,
call Accu-Chek Customer
Care.
The code chip is incorrect.
Turn the meter off and
insert a new code chip.
If this does not fix the
problem, call Accu-Chek
Customer Care.
An error occurred during the
test. Discard the test strip
and repeat the test. See
Chapter 1 "Understanding
Your New System."