pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9560-pgh_session_tunebook.ps) >>/Users/jc/w/tmp/Tune-9560-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_9560.log 415941 Log file, useful mostly for debugging
Coll_95603.log 131917 Log file, useful mostly for debugging
Coll_95604.log 413441 Log file, useful mostly for debugging
Form_9560.log 850 Log file, useful mostly for debugging
Form_95606.log 834 Log file, useful mostly for debugging
Tune-9560-get.log 4664 Log file, useful mostly for debugging
Tune-9560-pgh_session_tunebook.abc 473 ABC music file with the extracted tune(s)
Tune-9560-pgh_session_tunebook.ps 35813 PostScript
Tune-9560-pgh_session_tunebook.txt 473 Plain-text file with the extracted tune(s)
Tune-95601-get.log 4688 Log file, useful mostly for debugging
Tune-95603-get.log 6539 Log file, useful mostly for debugging
Tune-95606-5574.abc 374 ABC music file with the extracted tune(s)
Tune-95606-5574.malt 2299 Musical Instrument Digital Interface, alternate name for midi format
Tune-95606-5574.mid 2299 Musical Instrument Digital interface, shortened name for midi format
Tune-95606-5574.midi 2299 Musical Instrument Digital Interface, electronic version of the tune(s)
Tune-95606-5574.txt 374 Plain-text file with the extracted tune(s)
Tune-95606-get.log 3403 Log file, useful mostly for debugging
Tune-95608-get.log 8183 Log file, useful mostly for debugging
Tune-95609-get.log 15700 Log file, useful mostly for debugging
These files should be available for 24 hours.