I can't speak for OSX, but on Windows 7 I had to run FlexBuilder as an _administrative user_ before I could see results (i.e., same scenario as yours). Possibly you are running into a permissioning problem also.
I've checked my permissions, I am be running as admin so it's not that either.
Pity, PMD was really useful.
Sorry that didn’t help. After looking at the FlexPMD forum some more (since I made the post you saw), I now believe that the admin/permissions change is just a symptom/work-around for the ‘real’ issue: a problem with Java not being able to write to ‘temporary’ folder(s). But please note that I haven’t confirmed that belief yet, on my own machine, so it is an unverified assumption! If you want to pursue that idea, I’d suggest trying the suggestion of “nephi.wright” (Post #8, Feb 16, 2012) et al., at this FlexPMD forum URL: http://forums.adobe.com/thread/765512?tstart=0 (Note: if you’re on OSX, the actual path string to enter is going to be quite different—hopefully you know what the OSX equivalent would be…)
Thank you for keeping at it.
I just tried the "nephi.wright" solution: Created a new folder, gave everyone read/write access and set that up as java temp folder in the preferences. Didn't make any difference.
Strangely, I can't find any errors in system console after running FlexPMD. Eclipse creates a few, but none from PMD.
And even stranger, the "find suspect cut & paste" part of PMD runs just fine.