pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-23949-My_Dermot-Dm-32-2.ps) >>/Users/jc/w/tmp/Tune-23949-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/jig/My_Dermot-Dm-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_23949.log 930265 Log file, useful mostly for debugging
Tune-23949-My_Dermot-Dm-32-2.abc 578 ABC music file with the extracted tune(s)
Tune-23949-My_Dermot-Dm-32-2.ps 34108 PostScript
Tune-23949-My_Dermot-Dm-32-2.txt 578 Plain-text file with the extracted tune(s)
Tune-23949-get.log 5988 Log file, useful mostly for debugging
These files should be available for 24 hours.