Installation Error Messages; Low Battery; Invalid Signature Or Certificate; Error In Xmit - Texas Instruments TI-73 Software Manual

Installation Error Messages

Low Battery

Do not attempt to download a Flash application if the low-battery
message appears on the home screen. Low battery indication is
shown on the initial screen. If you receive this error during an
installation, change the batteries before trying again.

Invalid Signature or Certificate

This application does not need a certificate to run. If this error
occurs, it is probably due to a link failure caused by electrical
interference. Try to install the application again.

Error in Xmit

This problem is usually associated with the unit-to-unit cable and
its connection between the devices. Make sure the cable is firmly
inserted in the link port of each device.
TI-73 / TI-83 Plus Guess My Coefficients App Page 19