OK. I wish we'd known it had happened again. I thiought it was one of the "unexplained computer glitches". I guess it still is, but perhaps we'll have an explanation before 2012!

For anyone following this thread, could you please e-mail me the file "\SOFTRAK\SYSTEM\EZSSILCK.Ld4" as soon as the error is noticed (i.e. before you fix the problem by having everyone exit the system and re-enter a module. Thanks.