Running examples in ‘car-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: S
> ### Title: Modified Functions for Summarizing Linear, Generalized Linear,
> ###   and Some Other Models
> ### Aliases: S Confint S.lm S.glm S.default S.multinom S.polr S.lme
> ###   S.lmerMod S.glmerMod S.data.frame print.S.lm print.S.glm
> ###   print.S.multinom print.S.polr print.S.lme print.S.lmerMod
> ###   print.S.glmerMod Confint.lm Confint.glm Confint.multinom Confint.polr
> ###   Confint.lme Confint.lmerMod Confint.glmerMod Confint.default
> ### Keywords: models regression
> 
> ### ** Examples
> 
> mod.prestige <- lm(prestige ~ education + income + type, Prestige)
> S(mod.prestige, vcov.=hccm)
Call: lm(formula = prestige ~ education + income + type, data = Prestige)
Standard errors computed by hccm 

Coefficients:
              Estimate Std. Error t value Pr(>|t|)    
(Intercept) -0.6229292  5.2381025  -0.119 0.905593    
education    3.6731661  0.6982758   5.260 9.16e-07 ***
income       0.0010132  0.0002672   3.793 0.000265 ***
typeprof     6.0389707  3.7951209   1.591 0.114948    
typewc      -2.7372307  2.4384681  -1.123 0.264531    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard deviation: 7.095 on 93 degrees of freedom
  (4 observations deleted due to missingness)
Multiple R-squared: 0.8349
F-statistic: 120.2 on 4 and 93 DF,  p-value: < 2.2e-16 
   AIC    BIC 
669.02 684.52 

> S(mod.prestige, brief=TRUE)
Coefficients:
              Estimate Std. Error t value Pr(>|t|)    
(Intercept) -0.6229292  5.2275255  -0.119    0.905    
education    3.6731661  0.6405016   5.735 1.21e-07 ***
income       0.0010132  0.0002209   4.586 1.40e-05 ***
typeprof     6.0389707  3.8668551   1.562    0.122    
typewc      -2.7372307  2.5139324  -1.089    0.279    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard deviation: 7.095 on 93 degrees of freedom
  (4 observations deleted due to missingness)
Multiple R-squared: 0.8349
F-statistic: 117.5 on 4 and 93 DF,  p-value: < 2.2e-16 
   AIC    BIC 
669.02 684.52 

> Confint(mod.prestige, vcov.=hccm)
Standard errors computed by hccm 
                Estimate         2.5 %       97.5 %
(Intercept) -0.622929165 -1.102476e+01  9.778904256
education    3.673166052  2.286529e+00  5.059803411
income       0.001013193  4.826801e-04  0.001543706
typeprof     6.038970651 -1.497387e+00 13.575328718
typewc      -2.737230718 -7.579545e+00  2.105083723
> 
> # A logit model
> mod.mroz <- glm(lfp ~ ., data=Mroz, family=binomial)
> S(mod.mroz)
Error in ll(object) : could not find function "ll"
Calls: S -> S.glm -> fitstats -> AIC -> AIC.default
Execution halted