pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9642-Dovecote_Park-D-64-6.ps) >>/Users/jc/w/tmp/Tune-9642-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/jig/Dovecote_Park-D-64-6.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_96426.log 309620 Log file, useful mostly for debugging
Tune-9642-Dovecote_Park-D-64-6.abc 1069 ABC music file with the extracted tune(s)
Tune-9642-Dovecote_Park-D-64-6.ps 41557 PostScript
Tune-9642-Dovecote_Park-D-64-6.txt 1069 Plain-text file with the extracted tune(s)
Tune-9642-get.log 4671 Log file, useful mostly for debugging
These files should be available for 24 hours.