pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-78030-pgh_session_tunebook.ps) >>/Users/jc/w/tmp/Tune-78030-get.log 2>&1" returned status 256
http://pghardy.net/concertina/tunebooks/pgh_session_tunebook.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_78030.log 136757 Log file, useful mostly for debugging
Tune-78030-get.log 4577 Log file, useful mostly for debugging
Tune-78030-pgh_session_tunebook.abc 440 ABC music file with the extracted tune(s)
Tune-78030-pgh_session_tunebook.ps 34661 PostScript
Tune-78030-pgh_session_tunebook.txt 440 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.