258 Troubleshooting
Calculator error messages
Invalid User Name In the Add Student dialog box,
you either did not enter a user
name or you did not meet the
user name requirements. User
names must contain 3 to 12
letters and/or numbers.
Invalid Password In the Add Student dialog box,
you either did not enter a
password or you did not meet
the password requirements.
Passwords must contain 3 to 12
letters and/or numbers.
No Classes Selected You do not have any classes
selected for the student you are
creating or editing.
Error message Possible causes or solutions
Communication
failed
Check the cable
• The calculator is not
connected to the hub and/or
USB Silver Edition cable
correctly. Check the cable
connections to the hub and
the calculator, then try
again.
•(Student point of view only) The
teacher hasn’t started the
TI-Navigator™ system on his
or her computer. Wait until
the teacher starts
TI-Navigator and the class,
then try again.
Class not started (Student point of view only) The
teacher hasn’t started the class in
the TI-Navigator™ system. Wait
until the teacher starts the class
and try again.
Error message Possible causes or solutions