[R-pkg-devel] unable to run 'make clean' in 'src'

Hello:


 ????? "R CMD build bssm" complains:


 ??? ??????? unable to run 'make clean' in 'src'


 ????? This is on a Windows 10 computer with R 3.6.1 installed with, I 
think, Rtools35.exe.? "sessionInfo()" says, "Platform: 
x86_64-w64-mingw32/x64 (64-bit)".


 ????? This is trying to build a local clone of 
"https://github.com/sbgraves237/bssm", which is only slightly different 
from "helske/bssm".


 ????? What do you suggest?


 ????? Thanks,
 ????? Spencer Graves


p.s. 
"https://stackoverflow.com/questions/28723882/problems-installing-development-package-from-either-github-or-local#28724622" 
documents a discussion of this message from 2015.? It asks if "Rtools is 
in your PATH?"? The "path" includes "C:\RBuildTools\3.5" and "C:\Program 
Files\R\R3.6.1\bin" plus other non-R stuff.? That discussion also said, 
"The .o files in the src directory were messing things up."? bssm/src 
does not contain any *.o files.