pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4687-SweetKate.ps) >>/Users/jc/w/tmp/Tune-4687-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/SweetKate.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_46875.log 292438 Log file, useful mostly for debugging
Find_46870.log 1795 Log file, useful mostly for debugging
Tune-4687-032_Ding_Dong_Bell.abc 724 ABC music file with the extracted tune(s)
Tune-4687-032_Ding_Dong_Bell.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-4687-032_Ding_Dong_Bell.ps 33722 PostScript
Tune-4687-032_Ding_Dong_Bell.txt 724 Plain-text file with the extracted tune(s)
Tune-4687-SweetKate.abc 287 ABC music file with the extracted tune(s)
Tune-4687-SweetKate.ps 33706 PostScript
Tune-4687-SweetKate.txt 287 Plain-text file with the extracted tune(s)
Tune-4687-get.log 9824 Log file, useful mostly for debugging
Tune-46870-Cuz_Teahans_Frolics-001.svg 17600 Scalable Vector Graphics format
Tune-46870-Cuz_Teahans_Frolics.abc 483 ABC music file with the extracted tune(s)
Tune-46870-Cuz_Teahans_Frolics.txt 483 Plain-text file with the extracted tune(s)
Tune-46870-get.log 4453 Log file, useful mostly for debugging
These files should be available for 24 hours.