X:717 not found in http://www.nigelgatherer.com/tunes/abc/abc9/millb.abc
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8551-millb.ps) >>/Users/jc/w/tmp/Tune-8551-get.log 2>&1" returned status 256
http://www.nigelgatherer.com/tunes/abc/abc9/millb.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_85514.log 267879 Log file, useful mostly for debugging
Form_85510.log 877 Log file, useful mostly for debugging
Tune-8551-get.log 4163 Log file, useful mostly for debugging
Tune-8551-millb.abc 0 ABC music file with the extracted tune(s)
Tune-8551-millb.ps 6 PostScript
Tune-8551-millb.txt 0 Plain-text file with the extracted tune(s)
Tune-85511-1041_Mr_John_Shaw_Stewarts_Strathspey.abc 190 ABC music file with the extracted tune(s)
Tune-85511-1041_Mr_John_Shaw_Stewarts_Strathspey.txt 190 Plain-text file with the extracted tune(s)
Tune-85511-get.log 3782 Log file, useful mostly for debugging
These files should be available for 24 hours.