Hi Barry, and thanks very, very much for your comments. OK, I think I've resolved the issue of where the file is, as the program runs...and then dies. The error message I am getting now is:
"Error in tapply(MCP, MCPsplitlist, MCPfunction) : arguments must have same length" No idea what this means. Any idea? Thanks kindly - -- View this message in context: http://r.789695.n4.nabble.com/Help-w-an-old-R-program-I-ve-rediscovered-and-want-to-make-work-tp3928890p3929021.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.