• using R version 4.5.1 (2025-06-13)
• using platform: x86_64-pc-linux-gnu
• R was compiled by     gcc-14 (Debian 14.2.0-19) 14.2.0     GNU Fortran (Debian 14.2.0-19) 14.2.0
• running under: Debian GNU/Linux 13 (trixie)
• using session charset: UTF-8
• checking for file ‘torchopt/DESCRIPTION’ ... OK
• checking extension type ... Package
• this is package ‘torchopt’ version ‘0.1.4’
• package encoding: UTF-8
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• checking examples ... [2s/2s] ERROR Running examples in ‘torchopt-Ex.R’ failed The error most likely occurred in: > base::assign(".ptime", proc.time(), pos = "CheckExEnv") > ### Name: optim_adabelief > ### Title: Adabelief optimizer > ### Aliases: optim_adabelief > > ### ** Examples > > if (torch::torch_is_installed()) { + # function to demonstrate optimization + beale <- function(x, y) { + log((1.5 - x + x * y)^2 + (2.25 - x - x * y^2)^2 + (2.625 - x + x * y^3)^2) + } + # define optimizer + optim <- torchopt::optim_adabelief + # define hyperparams + opt_hparams <- list(lr = 0.01) + + # starting point + x0 <- 3 + y0 <- 3 + # create tensor + x <- torch::torch_tensor(x0, requires_grad = TRUE) + y <- torch::torch_tensor(y0, requires_grad = TRUE) + # instantiate optimizer + optim <- do.call(optim, c(list(params = list(x, y)), opt_hparams)) + # run optimizer + steps <- 400 + x_steps <- numeric(steps) + y_steps <- numeric(steps) + for (i in seq_len(steps)) { + x_steps[i] <- as.numeric(x) + y_steps[i] <- as.numeric(y) + optim$zero_grad() + z <- beale(x, y) + z$backward() + optim$step() + } + print(paste0("starting value = ", beale(x0, y0))) + print(paste0("final value = ", beale(x_steps[steps], y_steps[steps]))) + } Error: .onLoad failed in loadNamespace() for 'torch', details:   call: inst_path()   error: torch cannot write into '/home/hornik/tmp/R.check/r-release-gcc/Work/build/Packages/torch/'. Execution halted
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• DONE

Status: 1 ERROR