* using log directory ‘/srv/hornik/tmp/CRAN_pretest/npreg.Rcheck’
* using R Under development (unstable) (2026-03-05 r89546)
* using platform: x86_64-pc-linux-gnu
* R was compiled by
    Debian clang version 21.1.8 (3+b1)
    Debian flang version 21.1.8 (3+b1)
* running under: Debian GNU/Linux forky/sid
* using session charset: UTF-8
* current time: 2026-03-06 16:42:05 UTC
* checking for file ‘npreg/DESCRIPTION’ ... OK
* checking extension type ... Package
* this is package ‘npreg’ version ‘1.1.1’
* checking CRAN incoming feasibility ... [4s/4s] 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 ‘npreg’ can be installed ... [6s/6s] 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 whether startup messages can be suppressed ... [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 ... [16s/16s] OK
* checking Rd files ... [1s/1s] 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 ... [5s/5s] ERROR
Running examples in ‘npreg-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: smooth.influence.measures
> ### Title: Nonparametric Regression Deletion Diagnostics
> ### Aliases: smooth.influence.measures rstandard.ss rstandard.sm
> ###   rstandard.gsm rstudent.ss rstudent.sm rstudent.gsm dfbeta.ss
> ###   dfbeta.sm dfbeta.gsm dfbetas.ss dfbetas.sm dfbetas.gsm cov.ratio
> ###   cooks.distance.ss cooks.distance.sm cooks.distance.gsm hatvalues.ss
> ###   hatvalues.sm hatvalues.gsm
> 
> ### ** Examples
> 
> # generate data
> set.seed(1)
> n <- 100
> x <- seq(0, 1, length.out = n)
> fx <- 2 + 3 * x + sin(2 * pi * x)
> y <- fx + rnorm(n, sd = 0.5)
> 
> # fit models
> mod.ss <- ss(x, y, nknots = 10)
> mod.sm <- sm(y ~ x, knots = 10)
> mod.gsm <- gsm(y ~ x, knots = 10)
> 
> # calculate influence
> infl.ss <- smooth.influence.measures(mod.ss)
Error in UseMethod("dffits") : 
  no applicable method for 'dffits' applied to an object of class "ss"
Calls: smooth.influence.measures -> cbind -> dffits
Execution halted
* checking PDF version of manual ... [4s/4s] OK
* checking HTML version of manual ... [4s/4s] OK
* checking for non-standard things in the check directory ... OK
* checking for detritus in the temp directory ... OK
* DONE
Status: 1 ERROR