replicate

The question says it all. If you have a bug that multiple users report, but there is no record of the bug occurring in the log, nor can the bug be repeated, no matter how hard you try, how do you fix it? Or even can you? I am sure this has happened to many of you out there. What did you do in this situation, and what was the final outcome? Edit: I am more interested in what was done about an unfindable bug, not an unresolvable bug. Unresolvable bugs are such that you at least know that there is a problem and have a starting point, in most cases, for searching for it. In the case of an

In the documentation of sapply and replicate there is a warning regarding using ... Now, I can accept it as such, but would like to understand what is behind it. So I've created this little contrived example: innerfunction<-function(x, extrapar1=0, extrapar2=extrapar1) { cat("x:", x, ", xp1:", extrapar1, ", xp2:", extrapar2, "\n") } middlefunction<-function(x,...) { innerfunction(x,...) } outerfunction<-function(x, ...) { cat("Run middle function:\n") replicate(2, middlefunction(x,...)) cat("Run inner function:\n") replicate(2, innerfunction(x,...)) } outerfunction(1,2,3) outerfunction(1