Subject of the issue

Describe your issue here. cl <- parallel::makeCluster( parallel::detectCores() - 1, type = "FORK" ) #"PSOCK" #FORK -> avoid duplicated values or send data several time to GPU Error in makeForkCluster(nnodes = spec, ...) : fork clusters are not supported on Windows

doParallel::registerDoParallel(cl = cl)

I have used the solution below but it did not work library (foreach) library (iterators) library (parallel) library(doParallel) cl <- makeCluster(detectCores(), type='PSOCK') registerDoParallel(cl)

turn parallel processing off and run sequentially again:

registerDoSEQ()

Your environment

sessionInfo() R version 4.0.5 (2021-03-31) Platform: x86_64-w64-mingw32/x64 (64-bit) Running under: Windows 10 x64 (build 19043)

Matrix products: default

Random number generation: RNG: Mersenne-Twister Normal: Inversion Sample: Rounding

locale: [1] LC_COLLATE=English_United Kingdom.1252 LC_CTYPE=English_United Kingdom.1252 LC_MONETARY=English_United Kingdom.1252 LC_NUMERIC=C LC_TIME=English_United Kingdom.1252

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

other attached packages: [1] doParallel_1.0.16 iterators_1.0.13 foreach_1.5.1 lubridate_1.7.10 zoo_1.8-9 ggpubr_0.4.0 forcats_0.5.1 stringr_1.4.0 dplyr_1.0.5 purrr_0.3.4 readr_1.4.0 tidyr_1.1.3
[13] tibble_3.1.1 ggplot2_3.3.5 tidyverse_1.3.1

loaded via a namespace (and not attached): [1] httr_1.4.2 jsonlite_1.7.2 splines_4.0.5 carData_3.0-4 modelr_0.1.8 assertthat_0.2.1 cellranger_1.1.0 yaml_2.2.1 pillar_1.6.0 backports_1.2.1 lattice_0.20-41 glue_1.4.2
[13] digest_0.6.27 ggsignif_0.6.1 rvest_1.0.0 colorspace_2.0-0 cowplot_1.1.1 Matrix_1.3-2 pkgconfig_2.0.3 broom_0.7.6 haven_2.4.1 scales_1.1.1 openxlsx_4.2.3 rio_0.5.26
[25] mgcv_1.8-34 generics_0.1.0 farver_2.1.0 car_3.0-10 ellipsis_0.3.2 withr_2.4.2 cli_2.5.0 magrittr_2.0.1 crayon_1.4.1 readxl_1.3.1 fs_1.5.0 fansi_0.4.2
[37] nlme_3.1-152 rstatix_0.7.0 xml2_1.3.2 foreign_0.8-81 tools_4.0.5 data.table_1.14.0 hms_1.0.0 lifecycle_1.0.0 munsell_0.5.0 reprex_2.0.0 zip_2.1.1 compiler_4.0.5
[49] tinytex_0.31 rlang_0.4.10 grid_4.0.5 rstudioapi_0.13 labeling_0.4.2 gtable_0.3.0 codetools_0.2-18 abind_1.4-5 DBI_1.1.1 curl_4.3 R6_2.5.0 gridExtra_2.3
[61] utf8_1.2.1 stringi_1.5.3 Rcpp_1.0.6 vctrs_0.3.8 dbplyr_2.1.1 tidyselect_1.1.1 xfun_0.22

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