Man pages....look at the man pages. If you don't have them, you can find them on-line. Read them when you have nothing better to do. Find new commands and new ways of doing things.
The answer:
The only way to direct the standard output and standard
error separately is by invoking a subshell, as follows:
example% \(command > outfile\) >& errorfile
Although robust enough for general use, adventures into the
esoteric periphery of the C shell may reveal unexpected
quirks.