I get an error message when clicking on mesh generation saying "Unspecified error!"- see Fig. 1. Why?  

Fig 1 - Error message ‘Unspecified error!’ 

We believe the error message is triggered by a license problem. For some reason, the license is disconnected. We suggest you reconnect the license by opening the FEFLOW License tool and apply the license again - see Fig 2.  

Fig 2.  Open the License Tool to reconnect the license  

Related Products: FEFLOW