[Rd] "not a valid win32 application" with rtools40-x86_65.exe on Windows 10

[Spencer Graves]

Hello, All:


       "00install.out" from "R CMD check Ecfun_0.2-4.tar.gz" includes:


Error:  package or namespace load failed for 'Ecfun':
  .onLoad failed in loadNamespace() for 'rJava', details
   call: inDL(x, as.logical(local), as.logical(now), ...)
   error:  unable to load shared object 'c:/Program 
Files/R/R-4.0.0/library/rJava/libs/i386/rJava.dll':
   LoadLibrary failure: ^1 is not a valid win32 application


       This was after installing R 4.0.0 and "rtools40-x86_64.exe" under 
Windows 10 Pro 64-bit.


       Suggestions?
       Thanks,
       Spencer Graves


sessionInfo()
R version 4.0.0 (2020-04-24)
Platform: x86_64-64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18362)

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CCTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252

attached base packages:
[1] stats   graphics   grDevices  utils   datasets   methods   base

loaded via a namespace (and not attached):
[1] compiler_4.0.0