pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-65158-pgh_session_tunebook.ps) >>/Users/jc/w/tmp/Tune-65158-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
Form_65158.log 847 Log file, useful mostly for debugging
Tune-65158-get.log 4619 Log file, useful mostly for debugging
Tune-65158-pgh_session_tunebook.abc 408 ABC music file with the extracted tune(s)
Tune-65158-pgh_session_tunebook.ps 34951 PostScript
Tune-65158-pgh_session_tunebook.txt 408 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.