pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6991-Andrew_Rankine.ps) >>/Users/jc/w/tmp/Tune-6991-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/by/Andrew_Rankine.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
Find_6991.log 1482 Log file, useful mostly for debugging
Find_69916.log 1507 Log file, useful mostly for debugging
Form_69913.log 859 Log file, useful mostly for debugging
Tune-6991-Andrew_Rankine.abc 375 ABC music file with the extracted tune(s)
Tune-6991-Andrew_Rankine.ps 33337 PostScript
Tune-6991-Andrew_Rankine.txt 375 Plain-text file with the extracted tune(s)
Tune-6991-get.log 4257 Log file, useful mostly for debugging
Tune-69910-get.log 1594 Log file, useful mostly for debugging
Tune-69916-get.log 5099 Log file, useful mostly for debugging
Tune-69919-get.log 4268 Log file, useful mostly for debugging
These files should be available for 24 hours.