On Tue, Oct 9, 2012 at 10:54 PM, marsyxp <mars...@gmail.com> wrote: > I am using Donlp2 package to solve a non-linear problem, but there's an error > I always meet: > > Error in matrix(unlist(value, recursive = FALSE, use.names = FALSE), nrow = > nr, : > attempt to set an attribute on NULL > > I have been suffering from this bug for a long time. I'll be very grateful > if somebody could help me -_- >
This actually seems somewhat buggy: likely something internal is giving a NULL instead of a "real" value leading to the problems you see. You'll want to report this to the package maintainer (the only one who can fix it): to do so, use the maintainer() function to get contact info. He'll probably really appreciate it if your bug report includes a reproducible example following the advice here: http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example Michael ______________________________________________ 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.
