Running examples in ‘WaterML-Ex.R’ failed
The error most likely occurred in:

> ### Name: GetServices
> ### Title: GetServices
> ### Aliases: GetServices
> ### Keywords: waterml
> 
> ### ** Examples
> 
> GetServices()
No encoding supplied: defaulting to UTF-8.
Error in df$url[i] <- e$servURL : replacement has length zero
Calls: GetServices
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘WaterML-Tutorial.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 35-37 (WaterML-Tutorial.Rmd) 
Error: processing vignette 'WaterML-Tutorial.Rmd' failed with diagnostics:
replacement has length zero
--- failed re-building ‘WaterML-Tutorial.Rmd’

SUMMARY: processing the following file failed:
  ‘WaterML-Tutorial.Rmd’

Error: Vignette re-building failed.
Execution halted