* using log directory ‘/home/hornik/tmp/CRAN_special_donttest/npDoseResponse.Rcheck’
* using R Under development (unstable) (2026-01-15 r89304)
* using platform: x86_64-pc-linux-gnu
* R was compiled by
    gcc-15 (Debian 15.2.0-12) 15.2.0
    GNU Fortran (Debian 15.2.0-12) 15.2.0
* running under: Debian GNU/Linux forky/sid
* using session charset: UTF-8
* using option ‘--run-donttest’
* checking for file ‘npDoseResponse/DESCRIPTION’ ... OK
* checking extension type ... Package
* this is package ‘npDoseResponse’ version ‘0.2’
* package encoding: UTF-8
* checking CRAN incoming feasibility ... [4s/5s] OK
* 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 executable files ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking for sufficient/correct file permissions ... OK
* checking serialization versions ... OK
* checking whether package ‘npDoseResponse’ can be installed ... [1s/1s] OK
* checking package directory ... OK
* checking for future file timestamps ... 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/0s] OK
* checking whether the package can be loaded with stated dependencies ... [0s/0s] OK
* checking whether the package can be unloaded cleanly ... [0s/0s] OK
* checking whether the namespace can be loaded with stated dependencies ... [0s/0s] OK
* checking whether the namespace can be unloaded cleanly ... [0s/0s] OK
* checking loading without being on the library search path ... [0s/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 ... [3s/3s] OK
* checking Rd files ... [0s/0s] OK
* checking Rd metadata ... OK
* checking Rd line widths ... 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 ... [0s/0s] ERROR
Running examples in ‘npDoseResponse-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: DerivEffect
> ### Title: The proposed localized derivative estimator.
> ### Aliases: DerivEffect
> ### Keywords: a curve derivative dose-response estimator localized of the
> 
> ### ** Examples
> 
> ## No test: 
>   library(parallel)
>   set.seed(123)
>   n <- 300
> 
>   S2 <- cbind(2 * runif(n) - 1, 2 * runif(n) - 1)
>   Z2 <- 4 * S2[, 1] + S2[, 2]
>   E2 <- 0.2 * runif(n) - 0.1
>   T2 <- cos(pi * Z2^3) + Z2 / 4 + E2
>   Y2 <- T2^2 + T2 + 10 * Z2 + rnorm(n, mean = 0, sd = 1)
>   X2 <- cbind(T2, S2)
> 
>   t_qry2 = seq(min(T2) + 0.01, max(T2) - 0.01, length.out = 100)
>   chk <- Sys.getenv("_R_CHECK_LIMIT_CORES_", "")
>   if (nzchar(chk) && chk == "TRUE") {
+     # use 2 cores in CRAN/Travis/AppVeyor
+     num_workers <- 2L
+   } else {
+     # use all cores in devtools::test()
+     num_workers <- parallel::detectCores()
+   }
>   theta_est2 = DerivEffect(Y2, X2, t_eval = t_qry2, h_bar = NULL,
+                            kernT_bar = "gaussian", h = NULL, b = NULL,
+                            C_h = 7, C_b = 3, print_bw = FALSE,
+                            degree = 2, deriv_ord = 1, kernT = "epanechnikov",
+                            kernS = "epanechnikov", parallel = TRUE, cores = num_workers)
Error in .check_ncores(cores) : 32 simultaneous processes spawned
Calls: DerivEffect -> mclapply -> .check_ncores
Execution halted
* checking PDF version of manual ... [3s/3s] OK
* checking HTML version of manual ... [1s/1s] OK
* checking for non-standard things in the check directory ... OK
* checking for detritus in the temp directory ... OK
* DONE
Status: 1 ERROR