pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-15954-20301_Murrays_Waltz.ps) >>/Users/jc/w/tmp/Tune-15954-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP2/20301_Murrays_Waltz.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-15954-20301_Murrays_Waltz.abc 1062 ABC music file with the extracted tune(s)
Tune-15954-20301_Murrays_Waltz.ps 44222 PostScript
Tune-15954-20301_Murrays_Waltz.txt 1062 Plain-text file with the extracted tune(s)
Tune-15954-SCD_RoyGoldring_15SocialDances.abc 167 ABC music file with the extracted tune(s)
Tune-15954-SCD_RoyGoldring_15SocialDances.ps 6 PostScript
Tune-15954-SCD_RoyGoldring_15SocialDances.txt 167 Plain-text file with the extracted tune(s)
Tune-15954-get.log 9272 Log file, useful mostly for debugging
These files should be available for 24 hours.