There are recursive DIRs available in the UDF forum - a quich search should turn these up.

The process is actually pretty simple.

  • Get a recursive list of master dir
  • Get a recursive list of slave dir
  • Sort both - the Qsort() udf is good for this
  • Compare the lists side-by-side. If entry in list1 > entry in list2 then entry is missing from list 1 and vice-versa.