pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7342-tunebook.ps) >>/Users/jc/w/tmp/Tune-7342-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
Coll_73422.log 283119 Log file, useful mostly for debugging
Tune-7342-get.log 4503 Log file, useful mostly for debugging
Tune-7342-tunebook.abc 531 ABC music file with the extracted tune(s)
Tune-7342-tunebook.ps 34766 PostScript
Tune-7342-tunebook.txt 531 Plain-text file with the extracted tune(s)
Tune-73426-get.log 3922 Log file, useful mostly for debugging
Tune-73428-Where_Winding_Forth_Adorns_the_Vale_1-001.svg 25993 Scalable Vector Graphics format
Tune-73428-Where_Winding_Forth_Adorns_the_Vale_1.abc 460 ABC music file with the extracted tune(s)
Tune-73428-Where_Winding_Forth_Adorns_the_Vale_1.txt 460 Plain-text file with the extracted tune(s)
Tune-73428-get.log 4664 Log file, useful mostly for debugging
These files should be available for 24 hours.