Error using grViz

[anvillarroel]

Hi, I'm trying to use grViz (DiagrammerR library) but I get en error
Error in setwd(dir) : cannot change working directory
when using:

setwd("PATH_TO_FILE")     (using / instead of \\)
grViz("file.dot")

I thought that maybe the path was wrong, then I tried to test a code as simples as this (taken from https://rich-iannone.github.io/DiagrammeR/graphviz_and_mermaid.html), with the same result:

grViz("
digraph boxes_and_circles {

  # a 'graph' statement
  graph [overlap = true, fontsize = 10]

  # several 'node' statements
  node [shape = box,
        fontname = Helvetica]
  A; B; C; D; E; F

  node [shape = circle,
        fixedsize = true,
        width = 0.9] // sets as circles
  1; 2; 3; 4; 5; 6; 7; 8

  # several 'edge' statements
  A->1 B->2 B->3 B->4 C->A
  1->D E->A 2->4 1->5 1->F
  E->6 4->6 5->7 6->7 3->8
}
")

I guess I'm missing something,. :(

[anvillarroel]

I solved it. It was a problem regarding my computer and some configuration.
For same reason R, in the Temporal Directory linked to my user profile, has not enough permissions to access.
So I create a new directory (I prefert this than to mess with my user profile): c:\rtemp and then I create a file Renviron.site inside C:\Program Files\R\R-4.1.1\etc (I'm using 4.1.1) with the following content:
TMPDIR=C:/rtemp
TMP=C:/rtemp
TEMP=C:/rtemp

And after restarting R o RStudio (and using tempdir() to be sure) I dind't get any error message again.