Serious Error in Calendar

  This message means that your Calendar software has a
  serious problem.

  Please submit a Software Performance Report (SPR) to
  Hewlett-Packard describing the actions that led to this error.

  If you submit the SPR electronically, try to include a copy
  of your datafile.  The contents of the database will be treated
  with the utmost discretion and will be deleted after the
  investigation.