pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-81667-21451_Algerine_Sett_tune_4.ps) >>/Users/jc/w/tmp/Tune-81667-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP2/21451_Algerine_Sett_tune_4.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_81667.log 873 Log file, useful mostly for debugging
Tune-81667-21451_Algerine_Sett_tune_4.abc 1155 ABC music file with the extracted tune(s)
Tune-81667-21451_Algerine_Sett_tune_4.ps 38999 PostScript
Tune-81667-21451_Algerine_Sett_tune_4.txt 1155 Plain-text file with the extracted tune(s)
Tune-81667-get.log 9132 Log file, useful mostly for debugging
Tune-81667-v2tune.abc 143 ABC music file with the extracted tune(s)
Tune-81667-v2tune.ps 6 PostScript
Tune-81667-v2tune.txt 143 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.