Maestro will not load. If the Event log isn't showing much of anything, and the date.dmp isn't showing anything at all the error is occurring before Maestro gets a chance to write to the date.dmp, and before it gets to the login. This can be caused by corruption in the "user" ini file (e.g. C:\Maestro\Jock.ini) or Maestro.ini (C:\Winnt). Try renaming the ini to in0, and relaunching. If the user ini file is effected, the client must reconfigure all "preferences" and "Cart Express pages" for that user.