pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-78381-Swallowtail_Jig-Em-32-2.ps) >>/Users/jc/w/tmp/Tune-78381-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/session/jig/Swallowtail_Jig-Em-32-2.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_78381.log 270281 Log file, useful mostly for debugging
Tune-78381-Swallowtail_Jig-Em-32-2.abc 580 ABC music file with the extracted tune(s)
Tune-78381-Swallowtail_Jig-Em-32-2.ps 34166 PostScript
Tune-78381-Swallowtail_Jig-Em-32-2.txt 580 Plain-text file with the extracted tune(s)
Tune-78381-get.log 4790 Log file, useful mostly for debugging
These files should be available for 24 hours.