Build is not doing incremental/partial build

Hello,
I'm pressing the build button and hoping to do an incremental build, but uvision keeps rebuilding all projects files. I assume it's related to the fact that it's cleaning & deleting all the intermediate files. (Note, I'm not hitting the rebuild button which sounds like it's supposed to clean first) I'm using uvision 4.72 on Win7. I don't have a TZ env variable and I don't have the generate batch checkmark selected which was causing others to have the same problem.

Build target '<target processor>'
Clean started - Project: 'ap' deleting intermediate output files for target '<target processor>'

More questions in this forum