pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-13873-SowAndBear_a.ps) >>/Users/jc/w/tmp/Tune-13873-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/500/SowAndBear_a.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-13873-SowAndBear_a.abc 526 ABC music file with the extracted tune(s)
Tune-13873-SowAndBear_a.ps 34949 PostScript
Tune-13873-SowAndBear_a.txt 526 Plain-text file with the extracted tune(s)
Tune-13873-Thompson_V3_1766-1772_FTM.abc 161 ABC music file with the extracted tune(s)
Tune-13873-Thompson_V3_1766-1772_FTM.ps 6 PostScript
Tune-13873-Thompson_V3_1766-1772_FTM.txt 161 Plain-text file with the extracted tune(s)
Tune-13873-get.log 37907 Log file, useful mostly for debugging
These files should be available for 24 hours.