pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-24374-GeneralGaribaldisR_D4_16-JC.ps) >>/Users/jc/w/tmp/Tune-24374-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SCD/Graded2/GeneralGaribaldisR_D4_16-JC.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
Tune-24374-GeneralGaribaldisR_D4_16-JC.abc 447 ABC music file with the extracted tune(s)
Tune-24374-GeneralGaribaldisR_D4_16-JC.ps 36105 PostScript
Tune-24374-GeneralGaribaldisR_D4_16-JC.txt 447 Plain-text file with the extracted tune(s)
Tune-24374-get.log 4643 Log file, useful mostly for debugging
These files should be available for 24 hours.