Dear Yonghui, Yes, you can modify phreeqc.dat in order to fit your needs. While Phreeqci is running it loads the default database in order to create the various lists of species used by some of the keyword screens. When a database is loaded it cannot be modified. The easiest way to modify phreeqc.dat using phreeqci is to copy phreeqc.dat to something like my_phreeqc.dat and open that file with phreeqci. After you've made all the necessary changes save my_phreeqc.dat and close it. Then change the default database using "Set Default Database..." from the "Options" menu to your modified file. Another option is to modify the database file with another program such as Notepad. If you choose this option, you must make sure that phreeqci is not also running at the same time, otherwise you will receive the same error message. Also, you may want to install the latest version Build 2015 from the WWW at: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqc/index.html It includes some bug fixes as well as support for additional keywords. Scott Charlton U.S Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225 Song <gh38@xxxxxxxxxx To: charlton@xxxxxxxx lsruhe.de> cc: Subject: Protected phreeqc.dat? 07/11/2001 09:27 AM Dear Sir, I have a question about the Alpha test version 2.3.2010 of PHREEQCI, which includes also PHREEQC. When I tried to modify the Phreeqc.dat to fit my caculation, the file told me that it was protected, then could not be changed. It can not be deleted, too. But the same database downloaded from PHREEQC can be modified. Could you please tell me whether I can modify the Phreeqc.dat? If can, how? Thank you very much! With best wishes Yours sincerely -- Dr. Yonghui Song Institut für Siedlungswasserwirtschaft Universität Karlsruhe (TH) Am Adenauerring 20. D-76128 Karlsruhe GERMANY Tel.: +49 721 608 3880 Fax: +49 721 608 6372 Emails:gh38@xxxxxxxxxxxxxxxxxxx; songyonghui@xxxxxxxxxxx
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