I am trying to use redirection and it does not work.
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ds = InputBox("Type in reporting date as YYYY-MM-DD", "reporting date")
exestr = "Rterm --restore --save < m.in.R out.txt --args " & ds
ret = Shell(exestr) ' opens Rterm and does not source the script
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if I put the string in a batch file aaa.bat and use

ret=Shell(aaa.bat)

then redirection works, but I lose the return value from the process. ret
simply reports whether cmd started successfully.
I need to have the value returned from Rterm, which is 0 upon successful
finish and -1 otherwise.