That works in my tests (see attached project).
Code:
7/31/2012 9:49:54 AM: -------------------- Starting Build: 'Macro3.bld' --------------------
7/31/2012 9:49:54 AM: Building project step 1 - Project steps...
7/31/2012 9:49:54 AM: Building project step 2 - Set 1...
Created Temporary macro 'MACRO1'
7/31/2012 9:49:54 AM: Building project step 3 - Set 2...
Created Temporary macro 'MACRO2'
7/31/2012 9:49:54 AM: Building project step 4 - Set 3...
Created Temporary macro 'MACRO3'
7/31/2012 9:49:54 AM: Building project step 5 - Show 3...
MACRO3 = X.Y
7/31/2012 9:49:54 AM: Building project step 6 - Update 2...
Updated Temporary macro 'MACRO2'
7/31/2012 9:49:54 AM: Building project step 7 - Show 3 again...
MACRO3 = X.Z
7/31/2012 9:49:54 AM: Build successfully completed (elapsed = 00:00:00).
Make sure MACRO3 is being assigned the unexpanded macro references rather than expanded macro values (for instance, if you're using the Set Macro action, check the
Don't expand macros or script in value when setting option). If that doesn't help, please send the info requested at
http://www.kinook.com/Forum/showthread.php?t=3044