pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4789-Kerr_MM3-V2.ps) >>/Users/jc/w/tmp/Tune-4789-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM3/Kerr_MM3-V2.abc

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Form_47894.log 754 Log file, useful mostly for debugging
Tune-4789-Kerr_MM3-V2.abc 385 ABC music file with the extracted tune(s)
Tune-4789-Kerr_MM3-V2.ps 35777 PostScript
Tune-4789-Kerr_MM3-V2.txt 385 Plain-text file with the extracted tune(s)
Tune-4789-get.log 4191 Log file, useful mostly for debugging
Tune-47892-get.log 5069 Log file, useful mostly for debugging
Tune-47896-get.log 7802 Log file, useful mostly for debugging
Tune-47897-Miss_Sally_Hunter_of_Thurstons_Jig.abc 320 ABC music file with the extracted tune(s)
Tune-47897-Miss_Sally_Hunter_of_Thurstons_Jig.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-47897-Miss_Sally_Hunter_of_Thurstons_Jig.ps 35871 PostScript
Tune-47897-Miss_Sally_Hunter_of_Thurstons_Jig.txt 320 Plain-text file with the extracted tune(s)
Tune-47897-get.log 5837 Log file, useful mostly for debugging
These files should be available for 24 hours.