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Licence key-related error message : "All Keys Are Invalid..."

Typical error message found in the LUSASM_*.err file:

***ERROR*** All Keys Are Invalid For The Following Reasons:- 

Causes & links to solutions 

Errors such as this typically have one of the following causes:

For users with dongled, hard disk or ethernet licences:

1. 25-digit licence key typed incorrectly

2. Wrong licence key in use

For users with dongled licences only:

3. Dongle not inserted correctly

4. Sentinel drivers corrupt

5. Dongle has attracted a "time stamp" in the future

6. Parallel port problems

7. Dongle is broken

If you continue to encounter problems after following the instructions linked above, you should carry out a key test and contact LUSAS technical support.