pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-20022-CDM6.ps) >>/Users/jc/w/tmp/Tune-20022-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EFDSS/CDM6.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-20022-ArthursSeatWaltzes.abc 155 ABC music file with the extracted tune(s)
Tune-20022-ArthursSeatWaltzes.ps 6 PostScript
Tune-20022-ArthursSeatWaltzes.txt 155 Plain-text file with the extracted tune(s)
Tune-20022-CDM6.abc 16248 ABC music file with the extracted tune(s)
Tune-20022-CDM6.ps 165548 PostScript
Tune-20022-CDM6.txt 16248 Plain-text file with the extracted tune(s)
Tune-20022-get.log 27667 Log file, useful mostly for debugging
These files should be available for 24 hours.