My aim is this, to turn every "pack" folder in

C:\111\set1\members\set1\pack
C:\111\set2\members\set2\pack
C:\111\set2\media\pack <-- NOT TO BE PROCESSED
C:\111\set3\members\set1\pack
C:\111\set3\sub\pack <-- NOT TO BE PROCESSED

INTO

C:\111\set1\pack
C:\111\set2\pack2
C:\111\set2\media\pack  <-- NOT PROCESSED
C:\111\set3\pack
C:\111\set3\sub\pack  <-- NOT PROCESSED



And, dear lhunath has suggested this:

  for file in /cygdrive/c/cygwin/1111/*/members/*/*; do
             while [[ -d "${file%/../..}_$i" ]]; do
                          let i++
             done
             mv "$file" "${file%/../..}_$i"
  done


Plus, whatever way I may try,
I always get a "bash: syntax error near unexpected token `do'"