pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-10598-20591_Dorrs_Retreat.ps) >>/Users/jc/w/tmp/Tune-10598-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP2/20591_Dorrs_Retreat.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-10598-20591_Dorrs_Retreat.abc 628 ABC music file with the extracted tune(s)
Tune-10598-20591_Dorrs_Retreat.ps 34400 PostScript
Tune-10598-20591_Dorrs_Retreat.txt 628 Plain-text file with the extracted tune(s)
Tune-10598-get.log 15280 Log file, useful mostly for debugging
These files should be available for 24 hours.