int nChng = 0;           /* Number of files whose names have changed */
  int *aChng;              /* Two integers per name change */
  int i;                   /* Loop counter */
  Stmt q1;                 /* Query of name changes */

  *pnChng = 0;
  *aiChng = 0;
  if(0==iFrom){
    fossil_fatal("Invalid 'from' RID: 0");
  }else if(0==iTo){
    fossil_fatal("Invalid 'to' RID: 0");
  }
  if( iFrom==iTo ) return;
  path_reset();
  p = path_shortest(iFrom, iTo, 1, revOk==0);
  if( p==0 ) return;
  path_reverse_path();
  db_prepare(&q1,
     "SELECT pfnid, fnid FROM mlink"