When launching Solidworks license manager I get a message stating "licenses do not exist for the serial numbers entered. Would you like to activate now?" But I have activated weeks ago and things were working normally until a few days ago.
Have there been any changes to the licence server in terms of hardware changes since the last activation? this can change the internal ID of the machine that SolidWorks uses for licencing. If you contact your VAR they should be able to check the history of the licence and check any activation/deactivation.
Retrieving data ...