While installing "car" package in Rstudio in Ubuntu, I faced an error saying that dependencies "nloptr","lme4" and one more, are not installed. So I started installing "nloptr" but I faced this error-
configure: Need to download and build NLopt trying URL 'http://ab-initio.mit.edu/nlopt/nlopt-2.4.2.tar.gz' Error in download.file(url = "http://ab-initio.mit.edu/nlopt/nlopt- 2.4.2.tar.gz", : cannot open URL ' ' Execution halted /bin/tar: This does not look like a tar archive gzip: stdin: unexpected end of file /bin/tar: Child returned status 1 /bin/tar: Error is not recoverable: exiting now Warning message: In untar(tarfile = "nlopt-2.4.2.tar.gz") : '/bin/tar -xf 'nlopt-2.4.2.tar.gz'' returned error code 2 configure: Starting to install library to /tmp/RtmpSeLv7g/R.INSTALL18a67910d582/nloptr/nlopt-2.4.2 ./configure: line 3325: cd: nlopt-2.4.2: No such file or directory
System hangs after last line and when I restart after some time, "nloptr" is not installed and hence I am unable to install "car" package. I have updated R version and URL in error is working in browser. Please help me. Thanks in advance.