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

> ### Name: acetate
> ### Title: Spectral data for filters of different 'materials'
> ### Aliases: acetate materials acrylic polycarbonate plexiglas polystyrene
> ###   polyester polyvynil_chloride optical_glass plastic_film plastic_sheet
> ### Keywords: datasets
> 
> ### ** Examples
> 
> acrylic
[1] "Cherry_3C01_GT"        "Clear_0A000_XT"        "Clear_0F00_GT"        
[4] "Clear_2458_GT"         "Clear_UV_100_0A570_GT" "Orange_2C04_GT"       
[7] "Sky_Blue_5C01_GT"      "Solar_Clear_0Z023_GT"  "Yellow_1C33_GT"       
> 
> # select short-pass filters
> filters.mspct[acrylic]
Object: filter_mspct [9 x 1]
--- Member: Cherry_3C01_GT ---
Object: filter_spct [911 x 2]
Wavelength range 190 to 1100 nm, step 1 nm 
Label: Poly(methyl methacrylate) (PMMA) 'acrylic' sheet; Plexiglas 'Cherry 3C01 GT'; 0.002 m thick; new; from Evonik Industries, Germany 
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> ... print.generic_spct -> getWhenMeasured -> getWhenMeasured.generic_spct
Execution halted