I keep getting an error message when trying to run this app. What should I do?
I have checked the official website and the readme file in PDF format, but I couldn't find anything related to this error you're receiving. The FAQs and Troubleshooting section doesn't specify anything in connection with the Tukey-Kramer.
You can use the following PDF to read more about the application: http://media.pearsoncmg.com/cmg/pmmg_mml_shared/PHStat/PHStat2_3.5/PHStat_readme.pdf