The desktop and tester software must be compatible. If a software update is missed or rejected then an incompatibility may develop as is indicated by this error message:
This can be easily solved by insuring the tester is turned on, connected to the correct COM port, and then closing and reopening WinTI5000JX. You should be then presented with an opportunity to update as shown below:
If this does not solve the problem, go to System Setup to verify the COM port again. Then try a manual software download as outlined in Continue interrupted tester software download.