I created an R package. I made tar.gz using R CMD build.

but, I can't use R CMD check because of permission denied. My os is window 7.

Although R CMD check is well overall, There is the error in the final step.

I introduce error description in final step.

* checking examples ... ok
* checking for unstated dependencies in vignettes ... ok
* checking package vignettes in 'inst/doc' ... ok
* checking running R code from vignettes ...
    'Demo.Rnw' ...Warning in file(con,"r"):
    'Demo.Rnw.log' : permission denied
Error in file(con,"r") :
Warning message:
 'R CMD check Demo_0.99.0.tar.gz'

I tried to solute the problem using several methods.

First, turned off virus vaccine.

Second, I re-install the OS, Windows.

However, the problem is not fixed.

Please, could you please tell me how to fix. Thank you.