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

> ### Name: get_power_table
> ### Title: Create a power table for a combination of parameter values
> ### Aliases: get_power_table
> 
> ### ** Examples
> 
> paras <- study_parameters(n1 = 11,
+                           n2 = 10,
+                           n3 = 6,
+                           T_end = 10,
+                           icc_pre_subject = 0.5,
+                           icc_pre_cluster = 0,
+                           var_ratio = 0.03,
+                           icc_slope = 0.05,
+                           cohend = -0.8)
> 
> # increase only n2
> x <- get_power_table(paras, n2 = 10:15)
> plot(x)
> 
> # Compare two parameters
> x <- get_power_table(paras, n2 = 10:15, n3 = 6:8)
> plot(x)
> 
> # Compare impact of three parameters
> x <- get_power_table(paras, n2 = seq(3, 25, by = 3),
+                             n3 = c(3,6,9),
+                             icc_slope = c(0, 0.05, 0.1))
> plot(x)
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