pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-37639-Empire_Violin_Collection_of_Hornpipes_PD.ps) >>/Users/jc/w/tmp/Tune-37639-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ThomasCraig/EmpireCollection/Empire_Violin_Collection_of_Hornpipes_PD.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_37639.log 1670 Log file, useful mostly for debugging
Tune-37639-Empire_Violin_Collection_of_Hornpipes_PD.abc 384 ABC music file with the extracted tune(s)
Tune-37639-Empire_Violin_Collection_of_Hornpipes_PD.ps 34408 PostScript
Tune-37639-Empire_Violin_Collection_of_Hornpipes_PD.txt 384 Plain-text file with the extracted tune(s)
Tune-37639-get.log 10199 Log file, useful mostly for debugging
These files should be available for 24 hours.