Running examples in 'synthpop-Ex.R' failed
The error most likely occurred in:

> ### Name: multi.compare
> ### Title: Multivariate comparison of synthesised and observed data
> ### Aliases: multi.compare
> 
> ### ** Examples
> 
> ### default synthesis of selected variables
> vars <- c("sex", "age", "edu", "smoke")
> ods  <- na.omit(SD2011[1:1000, vars])
> s1 <- syn(ods)
Synthesis
-----------
 sex age edu smoke
> 
> ### categorical var
> multi.compare(s1, ods, var = "smoke", by = c("sex","edu"))

Plots of  smoke  by  sex edu 
Numbers in each plot (observed data):

        edu
sex      PRIMARY/NO EDUCATION VOCATIONAL/GRAMMAR SECONDARY
  MALE                     65                189       122
  FEMALE                  100                147       190
        edu
sex      POST-SECONDARY OR HIGHER
  MALE                         69
  FEMALE                      115
Error in namespaceExport(ns, exports) : 
  undefined exports: %s!=%, %s!==%, %s+%, %s<%, %s<=%, %s==%, %s===%, %s>%, %s>=%, %stri!=%, %stri!==%, %stri+%, %stri<%, %stri<=%, %stri==%, %stri===%, %stri>%, %stri>=%, stri_datetime_add<-, stri_sub<-, stri_subset<-, stri_subset_charclass<-, stri_subset_coll<-, stri_subset_fixed<-, stri_subset_regex<-, stri_c, stri_c_list, stri_cmp, stri_cmp_eq, stri_cmp_equiv, stri_cmp_ge, stri_cmp_gt, stri_cmp_le, stri_cmp_lt, stri_cmp_neq, stri_cmp_nequiv, stri_compare, stri_conv, stri_count, stri_count_boundaries, stri_count_charclass, stri_count_coll, stri_count_fixed, stri_count_regex, stri_count_words, stri_datetime_add, stri_datetime_create, stri_datetime_fields, stri_datetime_format, stri_datetime_fstr, stri_datetime_now, stri_datetime_parse, stri_datetime_symbols, stri_detect, stri_detect_charclass, stri_detect_coll, stri_detect_fixed, stri_detect_regex, stri_dup, stri_duplicated, stri_duplicated_any, stri_enc_detect, stri_enc_detect2, stri_enc_fromutf32, stri_enc_get, stri_enc_inf
Calls: <Anonymous> ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
Execution halted