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

> ### Name: factor_scores
> ### Title: Computes Factor Scores
> ### Aliases: factor_scores factor_scores.mcfa factor_scores.mctfa
> ###   plot.emmix
> ### Keywords: cluster multivariate models
> 
> ### ** Examples
> 
> # Fit a MCFA model to a subset
> set.seed(1)
> samp_size <- dim(iris)[1]
> sel_subset <- sample(1 : samp_size, 50)
> model <- mcfa(iris[sel_subset, -5], g = 3, q = 2, 
+                           nkmeans = 1, nrandom = 0, itmax = 100)

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> 
> # plot the data points in the factor space
> plot(model)
> 
> # Allocating new samples to the clusters
> Y <- iris[-c(sel_subset), -5]
> Y <- as.matrix(Y)
> clust <- predict(model, Y)
> 
> fa_scores <- factor_scores(model, Y)
> # Visualizing new data in factor space
> plot_factors(fa_scores, type = "Umean", clust = clust)
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: plot_factors ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
Execution halted