pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7270-141_Six_Little_Snails.ps) >>/Users/jc/w/tmp/Tune-7270-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EverydaySongBook/141_Six_Little_Snails.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-7270-141_Six_Little_Snails.abc 638 ABC music file with the extracted tune(s)
Tune-7270-141_Six_Little_Snails.ps 32323 PostScript
Tune-7270-141_Six_Little_Snails.txt 638 Plain-text file with the extracted tune(s)
Tune-7270-Mayden_Lane.abc 253 ABC music file with the extracted tune(s)
Tune-7270-Mayden_Lane.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-7270-Mayden_Lane.ps 32950 PostScript
Tune-7270-Mayden_Lane.txt 253 Plain-text file with the extracted tune(s)
Tune-7270-get.log 9942 Log file, useful mostly for debugging
Tune-72707-JigA_PLFD1665_178-001.svg 9785 Scalable Vector Graphics format
Tune-72707-JigA_PLFD1665_178.abc 326 ABC music file with the extracted tune(s)
Tune-72707-JigA_PLFD1665_178.txt 326 Plain-text file with the extracted tune(s)
Tune-72707-get.log 4246 Log file, useful mostly for debugging
These files should be available for 24 hours.