Texas Instruments TI TestGuard 4.0, Руководство пользователя

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Appendix B: Troubleshooting TI TestGuard™ 4.0 25
Appendix B: Troubleshooting TI
TestGuard™ 4.0
This section describes error messages and includes troubleshooting tips
for TI TestGuard™ 4.0.
Application Errors
Error Message Description
Check the following:
• The student’s calculator must be
either a TI-83 Plus, TI-84 Plus or a
TI-84 Plus C.
• The I/O unit-to-unit cable must be
securely attached to both the
teacher’s and the student’s
calculators. Try disconnecting the
cable and reconnecting it to both
units. Also, verify that you are
using an I/O unit-to-unit cable
and not a USB cable to connect
the calculators. TI TestGuard™ 4.0
does not work with USB cables.
• The student’s calculator must
have at least 2500 bytes of free
memory. If it does not, manually
delete some items from RAM.
• On the TI-83 Plus, TI-84 Plus and
TI-84 Plus C, press
y L
, then
select Mem Mgmt/Del to display
RAM FREE. You can delete items
to free RAM from this screen.
Select a data type (for example,
Prgm ), highlight an item to
delete, and press
{
.
• A program named test may
already be on the student’s
calculator. Delete the program
and run TI TestGuard™ 4.0 again.