pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6374-tunebook.ps) >>/Users/jc/w/tmp/Tune-6374-get.log 2>&1" returned status 256
http://richardrobinson.tunebook.org.uk/data/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_6374.log 839 Log file, useful mostly for debugging
Form_63740.log 848 Log file, useful mostly for debugging
Tune-6374-get.log 4500 Log file, useful mostly for debugging
Tune-6374-tunebook.abc 1169 ABC music file with the extracted tune(s)
Tune-6374-tunebook.ps 47678 PostScript
Tune-6374-tunebook.txt 1169 Plain-text file with the extracted tune(s)
Tune-63740-get.log 4039 Log file, useful mostly for debugging
Tune-63741-My_Cape_Breton_Home_2V-G-32-4.abc 1482 ABC music file with the extracted tune(s)
Tune-63741-My_Cape_Breton_Home_2V-G-32-4.txt 1482 Plain-text file with the extracted tune(s)
Tune-63741-get.log 4948 Log file, useful mostly for debugging
Tune-63744-get.log 6425 Log file, useful mostly for debugging
Tune-63749-get.log 5167 Log file, useful mostly for debugging
These files should be available for 24 hours.