howff opened a new issue #18860:
URL: https://github.com/apache/incubator-mxnet/issues/18860
## Description
Whilst building the R package it attempts to perform a test load which
fails. The call to `loadModule("mxnet")` in `R-package/R/zzz.R` fails, `ERROR:
loading failed` is reported and the R package cannot be loaded into R.
### Error Message
```
installing to C:\blah...
** R
** demo
** inst
** byte-compile and prepare package for lazy loading
** help
** installing vignettes
** testing if installed package can be loaded from temporary location
ERROR: loading failed
```
## To Reproduce
I have checked out the source code to mxnet branch 1.7.x (because that's
marked as current release).
The mxnet libraries build successfully (libmxnet.dll, etc).
The R-package builds successfully (mxnet.dll).
The installation fails to load the module.
### Steps to reproduce
```
R CMD INSTALL --no-multiarch R-package
```
## What have you tried to solve it?
1. I have tried both versions of R; R-3.6.3 and R-4.0.2
2. I have inserted print statements into `R/zzz.R` to determine that the
fault is in `loadModule("mxnet")`
3. I have determined that the DLLs appear to load as library.dynam(libmxnet)
and (mxnet) succeed.
## Environment
Windows 10, R-4.0.2 and rtools40 AND R-3.6.3 and rtools35, nvidia CUDA 10.2,
secondary GPU (GTX1050), openblas
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