Actually, I'm looking for the best code that will read a file for records and if not found, delete the same records from another file if they are found.  Ie.  I'm tyring to sync up two databases somewhat.  
 
I was using 'findv'  and if a record isn't found in the first file, it will do a find in the other and delete the record in the second.   Then I just use del @file
 
Any other easy way?

actually that will sync the whole database in one shot!
 
if you just want to sync when there is an error in the first file lookup to delete in the second then ...
 
findv M fnum file.a key x.x.x val lookup.data
if flerr(file.a) <> 0
  // Data not found in File A
  findv M fnum file.b key x.x.x val lookup.data
  if flerr(file.b) = 0
     // data is found in File B delete it.
    del @file.b nocnf
   endif
endif