question about using Splus in emacs

[Zhengyuan Zhu]

I installed ESS and after
M-x S in emacs, it ask me to specify working dir. After that it says:
"Searching for program: no such file or directory, Splus"

The splus is installed in another machine and can be used from command
line using "Splus" (I set an alias in .bashrc for Splus).

Anyone can tell me how to fix this? Thanks a lot!

==================
Zhengyuan Zhu
Statistics Department
UNC-CH, CB #3260
Chapel Hill, N.C. 27599-3260
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