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

> ### Name: FunctionXform
> ### Title: Add a function transformation to a WrapData object.
> ### Aliases: FunctionXform
> 
> ### ** Examples
> 
> # Load the standard iris dataset
> data(iris)
> 
> # Wrap the data
> irisBox <- WrapData(iris)
> 
> # Perform a transform on the Sepal.Length field: 
> # the value is squared and then divided by 100
> irisBox <- FunctionXform(irisBox,origFieldName="Sepal.Length",
+                          newFieldName="Sepal.Length.Transformed",
+                          formulaText="(Sepal.Length^2)/100")
> 
> # Combine two fields to create another new feature:                      
> irisBox <- FunctionXform(irisBox,
+                          origFieldName="Sepal.Width, Petal.Width",
+                          newFieldName="Width.Sum",
+                          formulaText="Sepal.Width + Sepal.Length")
>                          
> # Create linear model using the derived features
> fit <- lm(Petal.Length ~ 
+          Sepal.Length.Transformed + Width.Sum, data=irisBox$data)
> 
> # Create pmml from the fit
> library(pmml)
Loading required package: XML
Error: package or namespace load failed for 'pmml' 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_
Execution halted