R Under development (unstable) (2024-02-17 r85935 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> if (!require("WriteXLS")) stop("Package WriteXLS is not available.")
Loading required package: WriteXLS
> 
> z <- Sys.getenv("_R_CHECK_HAVE_PERLCSVXS_")
> 
> Sys.info()
       sysname        release        version       nodename        machine 
     "Windows"   "Server x64"  "build 20348"     "CRANWIN3"       "x86-64" 
         login           user effective_user 
        "CRAN"         "CRAN"         "CRAN" 
> 
> if(identical(as.logical(z), TRUE)) { 
+   if (!testPerl(verbose=FALSE)) 
+      stop("Perl or required modules used by WriteXLS are not functional.") 
+   } else {
+      message("PERL or modules not available. Skipping tests.\n")
+      message("_R_CHECK_HAVE_PERLCSVXS_ setting ", z, "\n")
+      }
PERL or modules not available. Skipping tests.

_R_CHECK_HAVE_PERLCSVXS_ setting 

> 
> proc.time()
   user  system elapsed 
   0.12    0.01    0.14