@hetong007 I come across the same problem as @smartinsightsfromdata when I try
to install mxnet
```r
cran <- getOption("repos")
cran["dmlc"] <-
"https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/";
options(repos = cran)
install.packages("mxnet")
```
```
trying URL
'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/src/contrib/mxnet_1.3.0.tar.gz'
Error in download.file(url, destfile, method, mode = "wb", ...) :
cannot open URL
'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/src/contrib/mxnet_1.3.0.tar.gz'
In addition: Warning message:
In download.file(url, destfile, method, mode = "wb", ...) :
cannot open URL
'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/src/contrib/mxnet_1.3.0.tar.gz':
HTTP status was '404 Not Found'
Warning in download.packages(pkgs, destdir = tmpd, available = available, :
download of package ‘mxnet’ failed
```
```r
wget
https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/src/contrib/mxnet_1.3.0.tar.gz
```
```
--2018-09-16 11:41:35--
https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/src/contrib/mxnet_1.3.0.tar.gz
Resolving apache-mxnet.s3-accelerate.dualstack.amazonaws.com
(apache-mxnet.s3-accelerate.dualstack.amazonaws.com)... 13.35.19.252,
2600:9000:2016:f400:c:171f:4888:3ee1, 2600:9000:2016:3000:c:171f:4888:3ee1, ...
Connecting to apache-mxnet.s3-accelerate.dualstack.amazonaws.com
(apache-mxnet.s3-accelerate.dualstack.amazonaws.com)|13.35.19.252|:443...
connected.
HTTP request sent, awaiting response... 404 Not Found
2018-09-16 11:41:36 ERROR 404: Not Found.
```
```r
sessionInfo()
```
```
R version 3.5.1 (2018-07-02)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 16.04.5 LTS
Matrix products: default
BLAS: /usr/local/lib/R/lib/libRblas.so
LAPACK: /usr/local/lib/R/lib/libRlapack.so
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
[3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
[5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8
[7] LC_PAPER=en_US.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] compiler_3.5.1 tools_3.5.1
```
[ Full content available at:
https://github.com/apache/incubator-mxnet/issues/12439 ]
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