pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-21851-Taylors_Measure.ps) >>/Users/jc/w/tmp/Tune-21851-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/LM/Taylors_Measure.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-21851-Taylors_Measure.abc 1069 ABC music file with the extracted tune(s)
Tune-21851-Taylors_Measure.ps 33900 PostScript
Tune-21851-Taylors_Measure.txt 1069 Plain-text file with the extracted tune(s)
Tune-21851-get.log 4511 Log file, useful mostly for debugging
These files should be available for 24 hours.