Couldn't Open Calendar Datafile

  The name you specified for the Calendar datafile does not
  exist or could not be opened for the reason given.

  This message appears the first time you run DECwindows
  Calendar and whenever you try to open a datafile that does
  not exist.

  If you meant to open a new datafile, click on Yes.  If not, click
  on No and check the datafile name that you provided.