A quick guess it that your version of R is outdated.sessionInfo() R version 3.5.0
package ‘taskscheduleR’ was built under R version 3.5.1 I don't know if that is the source of the error but I'd suggest updating to 3.5.1 as a first step. On Friday, August 24, 2018, 9:12:36 a.m. EDT, Christofer Bogaso <bogaso.christo...@gmail.com> wrote: Hi, I am trying to schedule an R job using taskscheduler_create() function available in package taskscheduleR. Below is my code: > library(taskscheduleR) Warning message: package ‘taskscheduleR’ was built under R version 3.5.1 > taskscheduler_create(taskname = "ABC", rscript = paste("C:\\ABC.R"), startdate = format(Sys.Date() + 1, "%d/%m/%Y"), schedule = "WEEKLY", starttime = "16:30", days = c("MON", "TUE", "WED", "THU", "FRI")[1]) [1] "ERROR: Incorrect Start Date." attr(,"status") [1] 16389 Warning message: In system(cmd, intern = TRUE) : running command 'schtasks /Create /TN "ABC" /TR "cmd /c C:/PROGRA~1/R/R-35~1.0/bin/Rscript.exe \"C:\ABC.R\" >> \"C:\ABC.log\" 2>&1" /SC WEEKLY /ST 16:30 /SD "25/08/2018" /D MON ' had status 16389 However it fails with stating Incorrect Start Date. Any help to understand what went wrong? I am using R in Windows. Below is Session Information : > sessionInfo() R version 3.5.0 (2018-04-23) Platform: x86_64-w64-mingw32/x64 (64-bit) Running under: Windows 10 x64 (build 17134) Matrix products: default locale: [1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252 LC_MONETARY=English_United States.1252 LC_NUMERIC=C LC_TIME=English_United States.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] taskscheduleR_1.1 loaded via a namespace (and not attached): [1] compiler_3.5.0 tools_3.5.0 data.table_1.11.4 [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.