pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-33685-30561_Mitchells_Hornpipe.ps) >>/Users/jc/w/tmp/Tune-33685-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP3/30561_Mitchells_Hornpipe.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_33685.log 459810 Log file, useful mostly for debugging
Form_33685.log 992 Log file, useful mostly for debugging
Tune-33685-30561_Mitchells_Hornpipe.abc 817 ABC music file with the extracted tune(s)
Tune-33685-30561_Mitchells_Hornpipe.ps 35754 PostScript
Tune-33685-30561_Mitchells_Hornpipe.txt 817 Plain-text file with the extracted tune(s)
Tune-33685-get.log 4944 Log file, useful mostly for debugging
These files should be available for 24 hours.