Thank you a lot!!! That was fantastic! It worked perfectly!!! Laura Hi Laura,
try using the functions try() and inherits() to "catch" any errors in the loop: summaryList <- list() for (i in 1:35) { tempSummary <- try(summary(resultList[[i]]), silent = TRUE) if (inherits(tempSummary, "try-error")) { summaryList[[i]] <- NA } else { summaryList[[i]] <- tempSummary } } I hope you can make it work?! :-) Christian ______________________________________________ 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.