Hello, On a previous version of PHENIX, 1.4-153, I was able to read in a parameter file with geometry constraints. Upon loading the file, the program asked when to execute the commands, I said at run time, and everything worked fine. Using the same parameter file in PHENIX 1.5-2, I am no longer asked about when to execute the file, and when I proceed to run the refinement, the program quits stating an unexpected character. I can't find anything obviously wrong with the parameter file. Any suggestions? The previous version of PHENIX (the one that worked) is no longer located on my server, so I can't easily return to that version. Thanks. Best Regards, John -- John Pascal, PhD ph 215.503.4596 Assistant Professor fx 215.923.2117 Thomas Jefferson University Biochemistry & Molecular Biology 233 South 10th Street, BLSB 804 Philadelphia, Pennsylvania 19107 ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.