Recurring error in global Apache error_log

#1
I keep seeing a firestorm of errors in my top-level Apache error_log file:

sh: /usr/bin/sed: No such file or directory

One time 777 times, the next 245 times. No timestamp so I don't know when it's happening, or why. Any thoughts?
 
#2
Issue found -- KH support suggested a find command and it tracked down a user script that referenced a couple of incorrect paths to utilities. The call was getting forked by Apache, and since that was what failed, the error went into the global error_log instead of the per-user error log. Had to write a short test to prove it to myself, but that's indeed what it was.
 
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