nlm_gaussianfield() fails when called in parallel

Hello

I'm trying to generate rasters using the nlm_gaussianfield() function. However, the generation fails whenever the function is called in a parallel session.

# Required packages
library(NLMR)
library(parallel)

# Works
mclapply(1:2, mc.cores = 1, function(x) {
  nlm_gaussianfield(ncol = 5, nrow = 5)
})

# Does not work
mclapply(1:2, mc.cores = 2, function(x) {
  nlm_gaussianfield(ncol = 5, nrow = 5)
})

This yields the following error message:

[[1]]
[1] "Error in RandomFieldsUtils::RFoptions(...) : \n  'RFoptions(...)' may be used only outside any parallel code\n"
attr(,"class")
[1] "try-error"
attr(,"condition")
<simpleError in RandomFieldsUtils::RFoptions(...): 'RFoptions(...)' may be used only outside any parallel code>

This appears to be an issue related to the RandomFields and RandomFieldsUtils packages, as the same code works when I install older package versions from the archive:

devtools::install_version("RandomFieldsUtils", version = "0.5", repos = "http://cran.us.r-project.org")
devtools::install_version("RandomFields", version = "3.3.1", repos = "http://cran.us.r-project.org", dependencies = F)

Here's my sessionInfo()

R version 4.2.1 (2022-06-23)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Linux Mint 20.3

Matrix products: default
BLAS:   /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.9.0
LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.9.0

locale:
 [1] LC_CTYPE=de_DE.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=de_DE.UTF-8        LC_COLLATE=de_DE.UTF-8    
 [5] LC_MONETARY=de_DE.UTF-8    LC_MESSAGES=de_DE.UTF-8   
 [7] LC_PAPER=de_DE.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=de_DE.UTF-8 LC_IDENTIFICATION=C       

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

other attached packages:
[1] NLMR_1.1

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.9              raster_3.5-21           uuid_1.1-0             
 [4] lattice_0.20-45         rlang_1.0.4             fastmap_1.1.0          
 [7] fansi_1.0.3             tools_4.2.1             RandomFields_3.3.14    
[10] grid_4.2.1              checkmate_2.1.0         utf8_1.2.2             
[13] terra_1.6-1             cli_3.3.0               RandomFieldsUtils_1.2.5
[16] htmltools_0.5.2         digest_0.6.29           lifecycle_1.0.1        
[19] crayon_1.5.1            IRdisplay_1.1           repr_1.1.4             
[22] codetools_0.2-18        base64enc_0.1-3         vctrs_0.4.1            
[25] IRkernel_1.3            glue_1.6.2              evaluate_0.15          
[28] sp_1.5-0                pbdZMQ_0.3-7            compiler_4.2.1         
[31] pillar_1.8.0            backports_1.4.1         jsonlite_1.8.0

ropensci / NLMR

nlm_gaussianfield() fails when called in parallel #99