pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6120-30393_Devans_Waltz_No_3.ps) >>/Users/jc/w/tmp/Tune-6120-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP3/30393_Devans_Waltz_No_3.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_61200.log 921018 Log file, useful mostly for debugging
Coll_61203.log 280610 Log file, useful mostly for debugging
Coll_61206.log 457011 Log file, useful mostly for debugging
Tune-6120-30393_Devans_Waltz_No_3.abc 705 ABC music file with the extracted tune(s)
Tune-6120-30393_Devans_Waltz_No_3.ps 34033 PostScript
Tune-6120-30393_Devans_Waltz_No_3.txt 705 Plain-text file with the extracted tune(s)
Tune-6120-get.log 4906 Log file, useful mostly for debugging
These files should be available for 24 hours.