Sage 100

Client on 2013 advanced can't logon this morning(All users/all workstations) was working over the weekend. Error started with SY_AvtivityLog not found, sometimes get SY_user not found. We've renamed sy_activitylog and sy_workstation and they get recreated but we still get the error. Administrative login still works. Will call support when they open, any ideas in the meantime?

Maybe rename SY_Console also.

And SY_Session.

Thanks Robert, we renamed sy_console and sy_session hasn't changed since 2014.

Virus? Files encrypted?

Doesn't look like it. We tried restoring system folder, etc. No luck, restored entire MAS90 folder and it works. Put their company folder back in place and they seem to be good to go.