pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4338-Four_Potatoes-G-32-2.ps) >>/Users/jc/w/tmp/Tune-4338-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/session/jig/Four_Potatoes-G-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_43382.log 513346 Log file, useful mostly for debugging
Coll_43383.log 298383 Log file, useful mostly for debugging
Coll_43384.log 1488053 Log file, useful mostly for debugging
Coll_43388.log 260446 Log file, useful mostly for debugging
Form_43385.log 833 Log file, useful mostly for debugging
Form_43386.log 845 Log file, useful mostly for debugging
Form_43387.log 936 Log file, useful mostly for debugging
Tune-4338-Four_Potatoes-G-32-2.abc 580 ABC music file with the extracted tune(s)
Tune-4338-Four_Potatoes-G-32-2.ps 33872 PostScript
Tune-4338-Four_Potatoes-G-32-2.txt 580 Plain-text file with the extracted tune(s)
Tune-4338-get.log 8496 Log file, useful mostly for debugging
Tune-43381-24CountryDances_1771_Randall.abc 162 ABC music file with the extracted tune(s)
Tune-43381-24CountryDances_1771_Randall.ps 6 PostScript
Tune-43381-24CountryDances_1771_Randall.txt 162 Plain-text file with the extracted tune(s)
Tune-43381-get.log 4476 Log file, useful mostly for debugging
Tune-43383-get.log 24341 Log file, useful mostly for debugging
Tune-43386-get.log 4716 Log file, useful mostly for debugging
Tune-43387-CSGBT_1794-V1.abc 147 ABC music file with the extracted tune(s)
Tune-43387-CSGBT_1794-V1.ps 6 PostScript
Tune-43387-CSGBT_1794-V1.txt 147 Plain-text file with the extracted tune(s)
Tune-43387-get.log 11596 Log file, useful mostly for debugging
These files should be available for 24 hours.