• using R version 4.1.2 (2021-11-01)
• using platform: x86_64-apple-darwin17.0 (64-bit)
• using session charset: UTF-8
• checking for file ‘RiverLoad/DESCRIPTION’ ... OK
• checking extension type ... Package
• this is package ‘RiverLoad’ version ‘1.0.3’
• package encoding: UTF-8
• checking package namespace information ... OK
• checking package dependencies ... OK
• checking if this is a source package ... OK
• checking if there is a namespace ... OK
• checking for executable files ... OK
• checking for hidden files and directories ... OK
• checking for portable file names ... OK
• checking for sufficient/correct file permissions ... OK
• checking whether package ‘RiverLoad’ can be installed ... [6s/7s] OK
• checking installed package size ... OK
• checking package directory ... OK
• checking DESCRIPTION meta-information ... OK
• checking top-level files ... OK
• checking for left-over files ... OK
• checking index information ... OK
• checking package subdirectories ... OK
• checking R files for non-ASCII characters ... OK
• checking R files for syntax errors ... OK
• checking whether the package can be loaded ... OK
• checking whether the package can be loaded with stated dependencies ... OK
• checking whether the package can be unloaded cleanly ... OK
• checking whether the namespace can be loaded with stated dependencies ... OK
• checking whether the namespace can be unloaded cleanly ... OK
• checking loading without being on the library search path ... OK
• checking dependencies in R code ... OK
• checking S3 generic/method consistency ... OK
• checking replacement functions ... OK
• checking foreign function calls ... OK
• checking R code for possible problems ... [6s/6s] OK
• checking Rd files ... [0s/0s] OK
• checking Rd metadata ... OK
• checking Rd cross-references ... OK
• checking for missing documentation entries ... OK
• checking for code/documentation mismatches ... OK
• checking Rd \usage sections ... OK
• checking Rd contents ... OK
• checking for unstated dependencies in examples ... OK
• checking contents of ‘data’ directory ... OK
• checking data for non-ASCII characters ... OK
• checking LazyData ... OK
• checking data for ASCII and uncompressed saves ... OK
• checking examples ... [2s/2s] ERROR
  Running examples in ‘RiverLoad-Ex.R’ failed
  The error most likely occurred in:
  
  > ### Name: method4
  > ### Title: Load estimation with time-weighted concentration method
  > ### Aliases: method4
  > ### Keywords: univ
  >
  > ### ** Examples
  >
  > data("flow.data1", "conc.data1")
  > union<-db.union(flow.data1, conc.data1)
  > met4<-method4(union, 2)
  > met4.month<-method4(union, 2, "month")
  Error in x[[jj]][iseq] <- vjj : replacement has length zero
  Calls: method4 -> [<- -> [<-.data.frame
  Execution halted
• checking PDF version of manual ... OK
• DONE
  Status: 1 ERROR
• using check arguments '--no-clean-on-error '