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

> ### Name: stat_mR
> ### Title: Generate mR chart in ggplot
> ### Aliases: stat_mR
> 
> ### ** Examples
> 
> #########################
> #  Example 1: mR Chart  #
> #########################
> 
> # Load Libraries ----------------------------------------------------------
>  require(ggQC)
>  require(ggplot2)
Loading required package: ggplot2
> 
> # Setup Data --------------------------------------------------------------
>  set.seed(5555)
>  Process1 <- data.frame(processID = as.factor(rep(1,100)),
+                         metric_value = rnorm(100,0,1),
+                         subgroup_sample=rep(1:20, each=5),
+                         Process_run_id = 1:100)
>  set.seed(5556)
>  Process2 <- data.frame(processID = as.factor(rep(2,100)),
+                         metric_value = rnorm(100,5, 1),
+                         subgroup_sample=rep(1:10, each=10),
+                         Process_run_id = 101:200)
> 
>  Both_Processes <- rbind(Process1, Process2)
> 
> # One Plot Both Processes -------------------------------------------------
>  ggplot(Both_Processes, aes(x=Process_run_id, y = metric_value)) +
+    stat_mR() + ylab("Moving Range")
Warning: Removed 1 rows containing missing values (geom_path).
Warning: Removed 1 rows containing missing values (geom_point).
> 
> # Facet Plot - Both Processes ---------------------------------------------
>  ggplot(Both_Processes, aes(x=Process_run_id, y = metric_value)) +
+    stat_mR() + ylab("Moving Range") +
+    facet_grid(.~processID, scales = "free_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