similar to: Problem with sink() in 1.20 on Windows (PR#779)

I run Win2000, and when I try to write to a file and later use it it seems that R 1.02.0 has a firm grip on it: > version _ platform i386-pc-mingw32 arch x86 os Win32 system x86, Win32 status major 1 minor 2.0 year 2000 month 12 day 15

On Thu, Dec 14, 2017 at 7:56 PM, Gabriel Becker <gmbecker at ucdavis.edu> wrote: > Gabor, > > You can grab the connection and destroy it via getConnection and then a > standard close call. Yeah, that's often a possible workaround, but since this connection was opened by readLines() internally, I don't necessarily know which one it is. E.g. I might open multiple

I noticed the following file descriptor leak when I couldn't remove a package unless I shut down the R session that had loaded and used it. The function that triggered the problem printed the output of a call to parse(). Each time one prints a srcref a connection is opened and not closed. It looks like it happens in as.character.srcref's call to getSrcLines, which has some logic I

Cran task views seems to be a "once-per-session" process -- the first attempt to access views in a (RGui for Windows) session works, but subsequent attempts fail. There is a noticeably long pause before the failing call returns. Example session with two calls to "available.views" follows, but similar effects have been observed with two calls to "install.views" and

Consider this code. This is R 3.4.2, but based on a quick look at the NEWS, this has not been fixed. tryCatch( readLines(tempfile(), warn = FALSE)[1], error = function(e) NA, warning = function(w) NA ) rm(list=ls(all.names = TRUE)) gc() showConnections(all = TRUE) If you run it, you'll get a connection you cannot close(), i.e. the last showConnections() call prints: ?

Hi all, I'm writing a function that read data from a binary file. I want to close all opened connections, but it failed: > showConnections() description class mode text isopen can read can write 3 "daten/t5_all.mea" "file" "rb" "binary" "opened" "yes" "no" 4 "daten/t5_all.mea"

Thanks for tracking this down. Yeah, I should use suppressWarnings(), you are right. Although, readLines() might throw another warning, e.g. for incomplete last lines, and you don't necessarily want to suppress that. TBH I am not sure why that warning is given: ? con <- file(tempfile()) ? open(con) Error in open.connection(con) : cannot open the connection In addition: Warning message: In

This may be more of an OS question ... I have this call r = get.hist.quote(symbol, start= format(start, "%Y-%m-%d"), end= format(end, "%Y-%m-%d")) which does a url request in a loop and my program runs out of file handlers after few hundred rotations. The error message is: 'Too many open files'. Other than increasing the file handlers assigned to my process, is there

> # creating a file > cat("sddfasdf", file="tempfile") > showConnections() class description mode text isopen can read can write > con <- file("tempfile", "r") > readLines(con) [1] "sddfasdf" Warning message: incomplete final line in: readLines(con, n, ok) > showConnections() class description mode text isopen

# Have no other connections opened yet > showConnections() class description mode text isopen can read can write > sink("tempfile") > close(getConnection(3)) > cat("send some output\n") Error in stdout() : invalid connection > sink() Error in sink() : invalid connection > cat("send some output\n") Error in stdout() : invalid connection >

# Have no other connections opened yet > showConnections() class description mode text isopen can read can write > sink("tempfile") > close(getConnection(3)) > cat("send some output\n") Error in stdout() : invalid connection > sink() Error in sink() : invalid connection > cat("send some output\n") Error in stdout() : invalid connection >

Hello yet again, R People: I was working with Ryacas and yacas last night and all was well. Now this morning, I keep getting the following: > a <- Sym("a") > a Error in summary.connection(x) : invalid connection > When I go to yacas from the command line, it works fine. Any suggestions, please? I'm thinking that a port might be open, but here I have: >

As far as I can tell, 'isOpen' cannot return FALSE in the case when 'rw = ""'. If the connection has already been closed by 'close' or some other function, then isOpen will produce an error. The problem is that when isOpen calls 'getConnection', the connection cannot be found and 'getConnection' produces an error. The check to see if it is

Hi all, I am trying to create a function that will open connections to all files of one type within the working directory. I've got the function to open the connections, but I am having a bugger of a time trying to get these connections named as objects in the workspace. I am at the point where I can do it outside of the function, but not inside, using assign. I'm sure I'm

I'm trying to figure out how to get out of this situation: > source('monit.r') Error in file(file, "r") : All connections are in use > showConnections() description class mode text isopen can read can write > help.search('connection') Error in file(file, "r") : All connections are in use > q() Save workspace image? [y/n/c]: y Error

SUMMARY: I'm proposing that R assert that 'connection' options have not changed since first created such that R will produce the following error: > fh <- file("a.txt", open = "w+") > cat("hello\n", file = fh) > close(fh) > fh2 <- file("b.txt", open = "w+") > cat("world\n", file = fh2) >

Hi, I am making multiple calls to gzfile() via read.table(), e.g. > x <- read.table( gzfile( "xxx.gz" ) ) After i do this many times (I haven't counted, but probably between 50 and 100 times) I get the error message: Error in open.connection(file, "r") : unable to open connection In addition: Warning message: cannot open compressed file 'xxx.gz' however, I

Hi, if we have a file called Rscript.R that contains the following, for example: x <- 1:100 outfile = "Rscript.Rout" sink(outfile) print(x) and then we run >> source("Rscript.R") we get an output file called Rscript.Rout - great! Is there an internal variable, something like .Platform, that holds the script name when it is being executed? I would like to use

Hello, I'm having a problem in R. I'm getting an error message that reads, "Too many open files". I'm opening files and closing them (and unlinking them), but when I go through that process 509 times, the program halts and I get this error message: "cannot open the connection" with warning messages: "Too many open files". I've been working on

Hi, I'm having trouble writing .pnm images which I think is due to a problem with my colour space. The pixmap object seems to be looking for 72 of 8 colours (one per cell?) which doesn't seem healthy... > library(pixmap) > x <- pixmapIndexed(rep(1:8, 9), nrow=6, col=rainbow(8)) > x Pixmap image Type : pixmapIndexed Size : 6x12 Resolution : 1x1