pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5033-2231-Donald_Quaich.ps) >>/Users/jc/w/tmp/Tune-5033-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/2231-Donald_Quaich.abc1.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_5033.log 1887868 Log file, useful mostly for debugging
Coll_50337.log 1360561 Log file, useful mostly for debugging
Form_50331.log 871 Log file, useful mostly for debugging
Tune-5033-2231-Donald_Quaich.abc 1342 ABC music file with the extracted tune(s)
Tune-5033-2231-Donald_Quaich.ps 38291 PostScript
Tune-5033-2231-Donald_Quaich.txt 1342 Plain-text file with the extracted tune(s)
Tune-5033-get.log 4630 Log file, useful mostly for debugging
Tune-50332-get.log 4483 Log file, useful mostly for debugging
Tune-50333-get.log 7971 Log file, useful mostly for debugging
These files should be available for 24 hours.