pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-61845-21673_THE_RENDEZVOUS_REEL.ps) >>/Users/jc/w/tmp/Tune-61845-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/21673_THE_RENDEZVOUS_REEL.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_61845.log 1835 Log file, useful mostly for debugging
Tune-61845-21673_THE_RENDEZVOUS_REEL.abc 544 ABC music file with the extracted tune(s)
Tune-61845-21673_THE_RENDEZVOUS_REEL.ps 35650 PostScript
Tune-61845-21673_THE_RENDEZVOUS_REEL.txt 544 Plain-text file with the extracted tune(s)
Tune-61845-get.log 4809 Log file, useful mostly for debugging
These files should be available for 24 hours.