Document ID: EPA-HQ-OAR-2008-0218-0067
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2014-05-02T04:00Z

To:  Reid Rosnick
From: Neal S. Nelson
Subject: Comparison of CAP88 calculations from SC&A and the EPA web version of CAP88
	As a cross check to assure that the version of CAP88 being used by SC&A is the same as the one which is downloaded from the EPA radiation website, a couple of the input data sets were obtained from SC&A.
	Initially I was unable to duplicate SC&A results. Investigation of the problem revealed I had a copy of `CAP88 ver3' which had an executable dated 02/24/07. I had downloaded it from the EPA website at some time in the past. The out put had scrambled the dose conversion files somehow.
	After discussing the question with SC&A, I discovered that the current version of `CAP88 ver3' has an executable dated 12/09/07. After I downloaded and installed a new copy of the current `CAP88 ver3', I was able to run and duplicate the SC&A calculations.
	Since the EPA website lists only `CAP88 ver3' for downloading, and does not indicate that different builds of the program have different executables, the only way to identify different builds is to compare the executables for size  and date.
	Also, I was unable to run the program on a computer that had been off line for a couple of years. The error report showed that Active X was unable to do something. It would appear that the Windows program must be up to date, so the computer must be on line to get the automatic updates to Windows.	
	Anyway, it seems that we are running the same version of `CAP88 ver3' as SC&A and can duplicate or extend any reports we get from them.