Status of an operating system service

If the command you're using doesn't support redirection to a file use a command pipe
e.g.
SET $ZT="CommandErr"
OPEN Command:"QR"
FOR {
USE Command
READ Text
USE $P
; do something with the text
}
CommandErr ;
SET ZE=$ZE
SET $ZT=""
USE $P
CLOSE Command
IF $P(ZE,">")="<ENDOFFILE" {
; successful completion
}
ELSE {
; something happened
}