rmt_read_rct reads in an MT3DMS/MT3D-USGS reaction package file and returns it as an RMT3DMS rct object.
rmt_read_rct(
  file = {     cat("Please select rct file ...\n")     file.choose() },
  btn = {     cat("Please select corresponding btn file ...\n")    
    rmt_read_btn(file.choose()) },
  ...
)
    | file | filename; typically '*.rct' | 
|---|---|
| btn | 
 | 
| ... | optional arguments passed to  | 
object of class rct