You should do 'cleartool findmerge -type d -<whateverruleyouareusing> -print' at first, to find out which directories need to be merged.
However, remember that if cleartool determines that a directory element needs to be merged, it cannot evaluate the candidates below that element. So, this will only print out the merge requirements for top level directories. If it detects a merge is required for any directory dA, the elements under dA are not really evaluated.
The Clearcase manual suggests that you keep executing: 'cleartool findmerge . -type d -<whateverruleyouareusing> -merge' till cleartool runs out of directories to merge.
Hope this helps.
