Running examples in 'm2b-Ex.R' failed
The error most likely occurred in:

> ### Name: extractRF
> ### Title: Extract the random forest model from an xytb object
> ### Aliases: extractRF
> 
> ### ** Examples
> 
> #track_CAGA_005 is dataset
> #generate a complete xytb object with derived (over moving windows of 3, 5
> #and 9 points, with quantile at 0, 50 and 100%) and shifted information on 10
> #and 100 points
> xytb<-xytb(track_CAGA_005,"a track",c(3,5,9),c(0,.5,1),c(10,100))
[1] "Compute 55 indicators on 3 moving windows"
[1] "Compute indicators on 3 points"
[1] "Done"
[1] "Compute indicators on 5 points"
[1] "Done"
[1] "Compute indicators on 9 points"
[1] "Done"
[1] "shift value backward"
[1] "shift backward 10"
[1] "shift backward 100"
[1] "Done"
> #compute a random forest model to predict behaviour (b, where -1 is
> #unobserved behaviour) using the derived
> #parameters ("actual")
> xytb<-modelRF(xytb,"actual",nob="-1",colin=TRUE,varkeep=c("v","thetarel"),zerovar=TRUE)
[1] "removing lines with NA values"
[1] "removing colinearity among predictors"
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: modelRF ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
Execution halted