Solution 31672: TI-Nspire™ or TI-SmartView™ Software Activation Returns an Error S28.
How do I resolve error S28 that occurs during activation of a TI-Nspire or TI-SmartView Software?
Error code S28 indicates that the license number has no activation remaining. If you need to activate additional computers, please purchase additional licenses from an instructional product dealer.
If you need to move a license from one machine to another, please contact TI for assistance.
Before you contact TI, please have your 31-character license number (Single Licenses) or 20-character claim number (Volume, Concurrent, or School-Managed Licenses) accessible. This license number can be found on:
- Your software's CD Sleeve
- Your software's confirmation e-mail
- The "About" dialog in TI-Nspire Family software version 3.0 and above.