pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1236-HUTB1-1844-V2.ps) >>/Users/jc/w/tmp/Tune-1236-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Hamilton/HUTB1/HUTB1-1844-V2.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_12360.log 140387 Log file, useful mostly for debugging
Find_12360.log 1712 Log file, useful mostly for debugging
Form_12362.log 856 Log file, useful mostly for debugging
Tune-1236-HUTB1-1844-V2.abc 605 ABC music file with the extracted tune(s)
Tune-1236-HUTB1-1844-V2.ps 34962 PostScript
Tune-1236-HUTB1-1844-V2.txt 605 Plain-text file with the extracted tune(s)
Tune-1236-get.log 8702 Log file, useful mostly for debugging
Tune-12360-get.log 3174 Log file, useful mostly for debugging
Tune-12364-get.log 4366 Log file, useful mostly for debugging
Tune-12367-get.log 4304 Log file, useful mostly for debugging
Tune-12369-get.log 9028 Log file, useful mostly for debugging
These files should be available for 24 hours.