* using log directory 'd:/Rcompile/CRANpkg/local/4.5/torchopt.Rcheck'
* using R version 4.5.1 (2025-06-13 ucrt)
* using platform: x86_64-w64-mingw32
* R was compiled by
    gcc.exe (GCC) 14.2.0
    GNU Fortran (GCC) 14.2.0
* running under: Windows Server 2022 x64 (build 20348)
* 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
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking whether package 'torchopt' can be installed ... OK
* checking installed package size ... OK
* checking package directory ... OK
* checking DESCRIPTION meta-information ... OK
* checking top-level files ... OK
* checking for left-over files ... OK
* checking index information ... OK
* checking package subdirectories ... OK
* checking code files for non-ASCII characters ... OK
* checking R files for syntax errors ... OK
* checking whether the package can be loaded ... [0s] OK
* checking whether the package can be loaded with stated dependencies ... [0s] OK
* checking whether the package can be unloaded cleanly ... [0s] OK
* checking whether the namespace can be loaded with stated dependencies ... [0s] OK
* checking whether the namespace can be unloaded cleanly ... [0s] OK
* checking loading without being on the library search path ... [0s] OK
* checking use of S3 registration ... OK
* checking dependencies in R code ... OK
* checking S3 generic/method consistency ... OK
* checking replacement functions ... OK
* checking foreign function calls ... OK
* checking R code for possible problems ... [7s] OK
* checking Rd files ... [1s] OK
* checking Rd metadata ... OK
* checking Rd cross-references ... OK
* checking for missing documentation entries ... OK
* checking for code/documentation mismatches ... OK
* checking Rd \usage sections ... OK
* checking Rd contents ... OK
* checking for unstated dependencies in examples ... OK
* checking examples ... [2s] ERROR
Running examples in 'torchopt-Ex.R' failed
The error most likely occurred in:

> ### 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])))
+ }
* checking for unstated dependencies in 'tests' ... OK
* checking tests ... [1s] OK
  Running 'testthat.R' [1s]
* checking PDF version of manual ... [20s] OK
* checking HTML version of manual ... [3s] OK
* DONE
Status: 1 ERROR