Texas Instruments TI-83 Plus Manual Book page 12

Link Transmission Error
This error indicates that the TI™ Connect or TI-GRAPH LINK™
software is unable to communicate with the calculator. The
problem is usually associated with the TI-GRAPH LINK cable
and its connection to the calculator or to the computer.
• Make sure the cable is firmly inserted in the calculator link
port and the computer.
• Verify that the correct cable type is selected in the software
link settings.
• Verify that the correct communications port (Com Port) is
selected in the software link settings.
Archive Full
This error occurs when the TI-83 Plus does not have sufficient
memory for the application. In order to make room for another
application, you must delete an application or archived variables
from the TI-83 Plus. Before you delete an application from the
TI-83 Plus, you can save it on your computer using TI Connect
software or TI-GRAPH LINK software for the TI-83 Plus. You can
reload it to the TI-83 Plus later using TI Connect or
TI-GRAPH LINK software.
TI-83 Plus Decimal Defender Application Page 12