A command like:
cleartool diffbl -act bl1@\apvob bl2@\apvob
will give you a list of actions that have new versions between the base levels bl1 and bl2.
However, to get a list of files (for example, items in files or directories, and not for versions, as in all updated versions, even for the same file), the best way:
cleartool chbl -full bl1@\apvob
cleartool chbl -full bl2@\apvob
( , )
cleartool find -all -element '{lbtype_sub(REL1) && lbtype_sub(REL2)}' ^
-version '{(lbtype(REL1) && ! lbtype(REL2)) || ^
(lbtype(REL2) && !lbtype(REL1))}' -print
. " ".
, " , ClearCase, , , , CLI ( ):

, , ( Elements/Labels) "Elements Changed Between Two Labels", "Versions Changed Between Two Labels" , .