Does not support non-ASCII characters in the file name

[madlogos]

When trying to operate some doc files with non-ASCII characters (e.g., Chinese characters)...

wdApp <- COMCreate("Word.Application")
doc <- wdApp[["Documents"]]$Open(file)

(there are Chinese characters in the full path of the object file)

RDCOMClient then returns with ...

<checkErrorInfo> 80020009 
No support for InterfaceSupportsErrorInfo
checkErrorInfo -2147352567
Error: Exception occurred.

And I found RDCOMClient does not support non-ASCII characters in quite many other scenarios.

Suppose I have a PowerPoint presentation with a TextFrame (title) on slide 1. I'm supposed to extract the text using

ppt <- COMCreate("Powerpoint.Application")
pres <- ppt[["Presentations"]]$Open(pptfile)
slide <- pres$Slides(1)
tf <- slide$Shapes(1)
print(tf$TextFrame()$TextRange$Text())

If the text is in English, the code above works well. But if there is any non-ASCII characters in it, I can simply get a "".

Could you please look into it? Many thanks.

sessionInfo:

R version 3.5.0 (2018-04-23)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.1252                        LC_CTYPE=Chinese (Simplified)_People's Republic of China.936
[3] LC_MONETARY=English_United States.1252                       LC_NUMERIC=C                                                
[5] LC_TIME=English_United States.1252                          

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] aseshms_0.1-15     RDCOMClient_0.93-0

loaded via a namespace (and not attached):
 [1] tidyselect_0.2.4     slam_0.1-43          NLP_0.1-11           reshape2_1.4.3       purrr_0.2.4          haven_1.1.1         
 [7] ggthemes_3.5.0       rJava_0.9-9          XLConnect_0.2-15     tcltk_3.5.0          colorspace_1.3-2     htmltools_0.3.6     
[13] yaml_2.1.19          rlang_0.2.0          recharts_0.2         pillar_1.2.2         foreign_0.8-70       glue_1.2.0          
[19] withr_2.1.2          RColorBrewer_1.1-2   readxl_1.1.0         bindrcpp_0.2.2       foreach_1.4.4        plyr_1.8.4          
[25] bindr_0.1.1          stringr_1.3.1        gWidgets2tcltk_1.0-5 cellranger_1.1.0     munsell_0.4.3        gtable_0.2.0        
[31] htmlwidgets_1.2      devtools_1.13.5      codetools_0.2-15     memoise_1.1.0        forcats_0.3.0        rio_0.5.10          
[37] knitr_1.20           extrafont_0.17       doParallel_1.0.11    tm_0.7-3             parallel_3.5.0       curl_3.2            
[43] Rttf2pt1_1.3.6       gWidgets2_1.0-7      Rcpp_0.12.17         readr_1.1.1          XLConnectJars_0.2-15 scales_0.5.0        
[49] DT_0.4               jsonlite_1.5         ggplot2_2.2.1        hms_0.4.2            digest_0.6.15        stringi_1.2.2       
[55] openxlsx_4.0.17      dplyr_0.7.5          grid_3.5.0           tools_3.5.0          magrittr_1.5         lazyeval_0.2.1      
[61] tibble_1.4.2         extrafontdb_1.0      pkgconfig_2.0.1      RODBC_1.3-15         data.table_1.11.2    xml2_1.2.0          
[67] assertthat_0.2.0     iterators_1.0.9      R6_2.2.2             compiler_3.5.0