Tom has apparently abandoned support for new versions of ACR in his script. You can make the script not complain about newer versions such as ACR 4.5 (or now ACR 4.6) if you open the jsx file in a text-editor or the ExtendScript Toolkit 2 editor and do a search/'replace operation to change all four occurrences of "4.1" to "4.5" or whatever version of ACR you are using.
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However, instead of using this script with LR 2 and ACR 4.5 and soon ACR 5.0, the recommended course of action is to use the DNG Profile Editor to create custom camera profiles which instead of taking 10s of minutes take only a few seconds.
You can create a general-purpose dual-color-table profile like comes with ACR or you can create lighting-scenario-specific profiles. Personally, I have created both a general purpose profile using two shots of my CC, one in incandescent (close to 2850K) and one is hazy sunlight (close to 6500K) or D65 lighting as well as several lighting-specific profiles where both color tables are computed from the same RAW.
The DNG Profile Editor is available from Adobe Labs in addition to some beta profiles for different situations: landscape, portrait, faithful, neutral, etc:
Check out the information and links on this page:
http://labs.adobe.com/wiki/index.php/DNG_Profiles
From: Mike F
Sent: Sunday, October 12, 2008 1:05 PM
To: AcrCalibrator
Subject: [acrcal] So now waddo I do?
Total novice speaking.
Now have a new Color chart.
Started the ACR Calibrator script.
Loaded some shots of the chart.
ACR Script doesn't like ACR 4.5
I have no idea what to do now.
As a person I used to work with was famous for saying 'Nothing
difficult is ever easy'