pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5455-ChoiceCollectionVol8-VMP.ps) >>/Users/jc/w/tmp/Tune-5455-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JohnJohnson/ChoiceCollectionVol8-VMP.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_5455.log 243586 Log file, useful mostly for debugging
Coll_54555.log 402950 Log file, useful mostly for debugging
Coll_54557.log 413086 Log file, useful mostly for debugging
Form_54554.log 1682 Log file, useful mostly for debugging
Tune-5455-ChoiceCollectionVol8-VMP.abc 63064 ABC music file with the extracted tune(s)
Tune-5455-ChoiceCollectionVol8-VMP.ps 831497 PostScript
Tune-5455-ChoiceCollectionVol8-VMP.txt 63064 Plain-text file with the extracted tune(s)
Tune-5455-get.log 145768 Log file, useful mostly for debugging
Tune-54556-get.log 10220 Log file, useful mostly for debugging
Tune-54559-get.log 5826 Log file, useful mostly for debugging
These files should be available for 24 hours.